Navigating the picture

Each view keeps its own zoom root (the folder that fills the view), its own selection and its own back and forward history. Everything on this page works the same in the treemap, the flame graph and the polar flame graph (see Visualizations), and almost everything has a key.

Zooming in and out

Zoom in makes a folder the new zoom root: its contents fill the view and the step goes into the view’s history.

How	Notes
Double-click a folder	On its title bar or frame, a collapsed block, a bar or a sector
Select it, then `Enter`	Also the Zoom in command in the palette
Context menu › Show only this (zoom in)	Same as `Enter`
Double-click a file	Zooms into the folder that holds the file and selects the file
Double-click “N small items” or “+N more”	Lays out the merged items one by one (see Small items)

Free space and unknown space can’t be zoomed into.

Zoom out with the history keys below, or double-click the flame graph’s root bar or the polar flame graph’s center disc to go up one level.

The zoom is animated: the block you double-clicked grows to fill the view, and going back shrinks it into its place again. Set the length in Settings › Visualization › Zoom animation duration (0 to 600 ms, 250 by default, 0 turns it off). With Settings › Appearance › Reduce motion on, zooming is instant.

Back, forward, up and root

Action	Keys	Toolbar button	What happens
Back	`Backspace`, `Alt`+`←`	Back	Returns to the previous zoom root and restores the selection you had there
Forward	`Shift`+`Backspace`, `Alt`+`→`	Forward	Undoes a Back
Up one level	`Alt`+`↑`	Up one level	Zooms out to the parent folder and selects the folder you just left
Root	`Ctrl`+`Home`	Root	Returns to the top of the scan; on a whole-volume scan the free and unknown space come back

Every tab and every split pane has its own history. Up and Root are recorded too, so Back undoes them.
Up and Root are disabled at the top of the scan.
Places that no longer exist (deleted, or gone after a rescan) are skipped when you go back or forward.
Changing the visualization, the coloring or the detail level is not recorded: Back always means “the previous place”.

The breadcrumb on the toolbar shows the path from the top of the scan to the zoom root.

Click an earlier segment to go up to it. Each level is one step in the history, so Back retraces them one at a time.
At the top of a whole-volume scan the breadcrumb shows the tab’s name and Whole volume.
Inside a merged block the last segment is “N small items” or “+N more”.
Click the last segment, or press Ctrl+L, to edit the path. The full path is selected; type or paste another one and press Enter. A folder becomes the zoom root; a file opens its folder with the file selected. Esc cancels. A path outside the scan says “The path doesn’t exist or is outside this scan.”

In split view each pane has its own breadcrumb, which you can click to go up. Path editing with Ctrl+L lives in the toolbar’s breadcrumb, so in split view type the path in the command palette instead (see Finding a path).

Selection and the details panel

Click a block to select it. Clicking a folder’s title bar, frame or padding selects the folder. Click an empty spot or press Esc to clear the selection. Right-clicking selects too, before it opens the menu.

The selection is kept by identity: it stays when the view is redrawn, when you change the level or the visualization, and while the scan updates the picture. If the selected item is hidden inside a collapsed folder, the ring is drawn on its nearest visible ancestor.

A selected block gets a white ring and a soft shadow (turn the shadow off with Selection shadow), and its ancestors light up (Highlight halo levels, both in Settings › Appearance).

The details panel

The panel on the right shows the selection, or the zoom root when nothing is selected. It has three tabs:

Tab	Shows
Details	Name and path; the size, with the number of files and folders and the latest change for a folder, or the file class and modification time for a file (hover that line for the exact number of bytes); when the folder is classed by folder, a line such as “Everything here counts as Games · Steam library”; Share of the parent folder and of the volume’s used space; for a folder, Largest items: the five largest files anywhere below it; Tags
Classes	The selection’s make-up by file class: a bar split in the class colors, then a row per class with its files, size, share and a bar, largest first. Click a row to filter by that class. Code and Data fold away while they hold less than 2% and less than 8 GB; Show all classes brings them back. For files a folder class took over, the tooltip says what their extensions make them, such as “By their extensions these are: Video 3.0 GB”. Hover a row or a segment of the bar and the picture lights that class up: the rest dims, while the class’s files, the small-items blocks mostly of it and the folders that count as it whole (a game install, say) keep their colors with a glowing edge, within the selected folder only. Move away and it’s back; the filter stays as it is
Largest files	Up to 50 of the largest files below it

Click a file in Largest items or Largest files to locate it: it is selected, and if it isn’t drawn (too deep or too small) the view zooms in, with history, until it is.

At the bottom are the actions Show in Explorer (Show in Finder on macOS, Show in file manager on Linux), Copy path and Add to delete basket, each with its key. The More actions button opens the context menu, like Shift+F10. Hide details panel gives the picture the whole width; Show sidebar at the right edge brings it back.

Drag the panel’s left edge to resize it (280 to 640 pixels, always leaving the picture at least 360), and the picture is laid out again as you drag. Double-click the edge for the default 320 pixels. The width is remembered. With the edge focused, ← and → resize it too (64 pixels at a time with Shift).

The panel changes with what you do:

While a filter is active it shows Matches, the results list.
While a scan runs and nothing is selected it shows Scan details.
When the delete basket is open it shows the basket.
For a merged block, free space or unknown space it explains what the block is.

Keys for the selection

Keys	Action
`Enter`	Zoom in
`Esc`	Clear the selection (in a comparison with nothing selected: leave the comparison)
`Ctrl`+`C`	Copy the path
`Ctrl`+`E`	Show in Explorer / Finder / file manager
`Ctrl`+`	Open a terminal in the folder (for a file: in its folder)
`Delete`	Add to the delete basket
`1`–`4` or `Ctrl`+`1`–`4`	Red, yellow, green or blue tag
`0` or `Ctrl`+`0`	Clear the tag of the item and everything below it
`Shift`+`F10`, menu key	Open the context menu

Delete only puts the item in the delete basket; nothing leaves the disk until you act in the basket (see Freeing up space). The keys without Ctrl for tags can be turned off with Settings › Tags › Ctrl is optional when the treemap has focus; more in Tags and file classes.

Hover cards

Rest the pointer on a block for a moment and a card appears beside it, placed so that it doesn’t cover the block. It shows:

the name and the folder it is in;
the size and its share of the parent folder;
for a folder, the number of files and folders; for a file, its file class and extension;
the Created, Modified and Accessed times, with how long ago.

Once a card is open, moving to another block switches the card’s content at once. Three switches in Settings › General › Hover tips control this: Keep open when moving between blocks, Show dates and times and Show file age.

In the polar flame graph the card follows the pointer.
No card is shown while a zoom animation runs.
Hover highlight (Settings › Appearance) draws a thin white outline around the block under the pointer; Mouse trail leaves fading outlines on the blocks the pointer passes.
Hovering a row in the results list highlights its block in the picture the same way.

Right-click a block, a bar or a sector to open its menu; the block is selected first. From the keyboard, Shift+F10 or the menu key opens the menu of the selection, placed beside it. In the flame graphs with nothing selected, it opens the zoom root’s menu (the root bar or center disc); in the treemap it needs a selection.

The menu starts with a header (name, size, type, parent folder) and then:

Item	Keys	Does
Open		Opens the file with its default app, or the folder
Show in Explorer (Finder, file manager)	`Ctrl`+`E`	Shows it in the system’s file manager
Open terminal here	`Ctrl`+`	A terminal in the folder, or in a file’s folder
Copy path ▸		As is (`Ctrl`+`C`), Quoted, POSIX path, file:// URI; each shows a preview
Add tag ▸		Red tag, Yellow tag, Green tag, Blue tag (`Ctrl`+`1`–`4`), Clear tag (`Ctrl`+`0`)
Show only this (zoom in)	`Enter`	Zooms in
Classify ▸ (folders only)		Automatic, By extension only, or Count as a class: every file in the folder counts as that class. See Classes by folder
Rescan this folder		Reads the folder again with everything below it (for a file: its folder)
Add to delete basket	`Delete`	Puts it in the delete basket
System menu…		Listed, not available yet

Inside the menu:

Keys	Action
`↑` / `↓`	Move
`→` or `Enter` on Copy path, Add tag or Classify	Open the submenu
`←`	Close the submenu
`Enter`	Run the highlighted item
`Esc`	Close the submenu, then the menu

An item that can’t be used stays in the menu: hover it, or choose it, to see why. A merged block, for example, has no single place to open or copy. The menu closes when you click elsewhere, resize the window or switch to another app. On the root bar and the center disc there is no Show only this (zoom in), because that is already the zoom root.

Split view

Split view shows two views of the same scan side by side. Turn it on with the Split view button on the toolbar or the Split view command in the palette; use either again to go back to one view (the focused pane stays).

The new pane starts at the top of the scan with the focused pane’s visualization, coloring, detail level and free and unknown space switches.
From then on each pane has its own zoom, history, selection, filter, visualization and level.
Each pane has a header with its own breadcrumb (click a segment to go up), its size, the number of matches while it filters, its own filter box, and a button to close it (Close left pane, Close right pane). Close one and the other takes the whole area.
Click inside a pane to focus it; its header is highlighted. The toolbar, the keys and the details panel follow the focused pane.
Split view is not available while comparing snapshots.

Ideas: a treemap and a flame graph of the same place; a whole drive on the left and one deep folder on the right; the same area with and without a filter.

Tabs

Each scan opens in its own tab in the title bar. The tab shows the scan’s state after its name (“· Scanning”, “· Paused”, “· Incomplete”, “· Scan failed”), and its tooltip shows the file system and size.

Keys	Action
`Ctrl`+`T`	New tab, on the start page (New scan)
`Ctrl`+`W`	Close the tab; middle-click a tab or its × does the same
`Ctrl`+`Tab`, `Ctrl`+`PageDown`	Next tab
`Ctrl`+`Shift`+`Tab`, `Ctrl`+`PageUp`	Previous tab
`Ctrl`+`Shift`+`PageUp` / `PageDown`	Move the current tab one place left / right
`Ctrl`+`,`	Settings

Tab switching wraps around.
Drag a tab sideways to change the order: it takes a neighbour’s place once the pointer passes that tab’s middle. Esc while dragging puts every tab back. Moving the tabs with the keys stops at the ends.
Closing a tab that is still scanning stops that scan. Closing the last tab leaves an empty New scan tab.
Settings opens as a tab of its own, and only once. In it, / or Ctrl+F jumps to the settings search, and Backspace / Alt+← and Alt+→ move back and forward through the settings pages you visited.

The results list

While a filter is active (/ or Ctrl+F, see Filters), the details panel becomes Matches: the total size and count of the matches, their share of what was scanned, the filter’s conditions, and a list.

The list follows the picture, and only covers what is below the zoom root:

a matching file that is drawn on its own is one row;
matches hidden in a collapsed folder or in a merged block are grouped into that block’s row, with the number of items;
matches under blocks too small to draw at all are one last row, “N more items”.

So the rows add up to the total. If the list says No matches here, go up a level (Alt+↑) to search a wider area. Sort it By size, By name or By item count with the menu at the top.

Mouse or key	Action
Hover a row	Highlights its block in the picture
Click	Locates the block: selects it, zooming in if needed
Double-click, `Enter`	Zooms in
Right-click	Opens the block’s context menu
`↑` / `↓`, `Home` / `End`, `PageUp` / `PageDown`	Moves through the list, highlighting each block
`Space`	Locates the highlighted row
`Delete`	Adds the file or folder to the delete basket

Keys with Alt or Ctrl still go to the view, so Alt+↑ and Ctrl+Home work while the list has focus.

Finding a path

The command palette (Ctrl+K) finds any file or folder in the scan. See Command palette for everything it does.

By name: type part of a name. Exact names come first, then names that start with it, then names that contain it, then names with the letters in order; within each group the largest come first. Enter on a result zooms to it: a folder becomes the zoom root, a file opens its folder with the file selected.
By path: type a path such as C:\Users\lenny\Videos, /home/lenny/Videos or one starting with ~. The first row is Go to that path. Type a folder path ending in a separator and the palette lists what is inside; Tab completes the highlighted row, so you can walk down folder by folder. A path outside the scan offers Scan this location.
Like the selection: select something, open the palette and leave the input empty. The paths group lists up to five other items whose names contain the selected one’s name (“Matching the selection …”). Select one node_modules folder and you see others at once.

Places you jumped to show up under Recent next time.

All keys on this page

Keys	Action
Double-click, `Enter`	Zoom in
`Backspace`, `Alt`+`←`	Back
`Shift`+`Backspace`, `Alt`+`→`	Forward
`Alt`+`↑`	Up one level
`Ctrl`+`Home`	Root
`Ctrl`+`L`	Edit the path
`/`, `Ctrl`+`F`	Focus the filter
`Ctrl`+`K`	Command palette
`Esc`	Clear the selection
`Shift`+`F10`, menu key	Context menu
`Ctrl`+`C` / `Ctrl`+`E` / `Ctrl`+`	Copy path / show in file manager / open terminal
`Delete`	Add to the delete basket
`1`–`4`, `0` (with or without `Ctrl`)	Tag, clear tag
`Ctrl`+`T` / `Ctrl`+`W`	New tab / close tab
`Ctrl`+`Tab` / `Ctrl`+`Shift`+`Tab`	Next / previous tab
`Ctrl`+`PageDown` / `Ctrl`+`PageUp`	Next / previous tab
`Ctrl`+`,`	Settings

The keys for the visualization itself (V, C, F, U, the detail level) are in Visualizations; every key is in Keyboard shortcuts.