Undo, version history and recovery

Nixt Slides has three safety nets, each for a different situation:

Situation	Use
You made a change you don’t want, and the presentation is still open	Undo and redo
You saved over a file and want what it was before	Version history
The app closed before you saved	Recovery copies

Undo and redo

To	Click	Or press
Undo the last change	Undo, at the right end of the ribbon’s tab row	`⌘Z` (`Ctrl+Z` on Windows and Linux)
Redo a change you undid	Redo, next to Undo	`⇧⌘Z` (`Ctrl+Shift+Z`)

The tooltips name the change: for example “Undo New slide”, “Undo Typing” or “Redo Solid style”. When there’s nothing to undo or redo, the buttons are unavailable and say “Nothing to undo” or “Nothing to redo”.

Nixt Slides remembers the last 200 changes in the open presentation.
Typing into the same shape, cell or slide’s notes several times in a row counts as one change. So do several position and size changes to the same shape in a row, and each drag of a table’s column or row border.
Formatting commands such as Bold are always separate changes, even straight after typing.
Making a new change after undoing clears what you could redo.
Saving doesn’t clear the history. Closing the presentation, restoring a version and restoring a recovery copy do.

These aren’t changes to the presentation and can’t be undone: selecting, going to another slide, switching views, showing or hiding the notes pane or the slide inspector, collapsing the ribbon, and turning Advance on the deck’s own timings on or off.

Names of undo steps

Step name	Made by
New slide, Duplicate slide, Delete slide, Move slide	Slide commands
Hide slide, Show slide	Hiding and showing slides
Slide size	16:9 or 4:3
Background	Slide background
Transition	The transition menu
Speaker notes	Typing notes
Text box, Shape, Picture, Table	Inserting
Typing	Editing text in a shape or cell
Bold, Italic, Align, Bullets	Home › Text
Link, Remove link	Adding or removing a link
Fill, Cell fill	Shape fill and Cell shading
Style name style	Quick styles, for example “Fade style”
Bring to front, Send to back	Stacking order
Align, Distribute	Lining up and spacing out shapes
Group, Ungroup	Grouping
Move	Typing a position or size in the slide inspector
Delete shape	Deleting a shape
Insert row, Delete row, Insert column, Delete column, Merge cells, Split cell, Column width, Row height	Table commands
Scheme name theme, Fonts	Design › Themes and Design › Fonts
Effect name animation, Animation start, Animation timing, Reorder animation, Remove animation	The Animations tab
Rehearsed timings, Clear timings	Keeping a rehearsal, clearing timings

Version history

Each time Save replaces an existing file, Nixt Slides first keeps a copy of what the file contained. Those copies are the file’s version history.

Up to 20 versions are kept for each file. When there are more, the oldest is deleted.
Versions are stored in the app’s own data folder on your computer, not next to your presentation.
The history belongs to the file’s location. If you move or rename the file, it starts a new history.
Save a copy as doesn’t create a version.
A new presentation has no history until you save it a second time: the first save creates the file, and the second save replaces it, keeping the first as a version.

Restore a version

Choose More › Version history.
The Version history dialog lists up to the 12 most recent versions, newest first. Each row shows when that version was saved — a 24-hour time for today, or the day and month followed by the time for earlier days — and its size in KB.
Click the version you want.

The version replaces the presentation in the editor, and you go to slide 1. The status bar says “Restored the version from” followed by the time. The presentation is marked as having unsaved changes, and the undo history is cleared.

The file on your disk doesn’t change until you save. When you save, the file’s current contents are kept as a version first, so you can change your mind.

To close the dialog without restoring anything, click Close.

If no versions exist yet, the dialog says “Nothing yet. A version is kept each time a save replaces this file, so the first one appears the second time you save it.” If the history can’t be read, the status bar says “Could not read the version history:” followed by the reason.

Recovery copies

While a presentation has unsaved changes, Nixt Slides writes a recovery copy every 30 seconds. Nothing is written while there are no unsaved changes. The copy is deleted when you save the presentation with Save.

Recovery copies are stored in the app’s own data folder, not next to your presentation.

Get unsaved work back

Open the presentation again — from RECENT or with Open a presentation. For a presentation that was never saved, start a New presentation.
If a recovery copy is newer than the file on your disk, a dialog titled Unsaved work from followed by the time appears. It explains that a copy of the presentation was kept that was never saved, and that restoring it replaces what is open while the file on disk isn’t touched until you save.
Choose:
- Restore — the recovered presentation replaces what’s open. The status bar says “Restored unsaved work from” followed by the time. Save to keep it.
- Discard it — the recovery copy is deleted.

A recovery copy that is older than the file on disk is deleted without asking, because the file already has newer work in it.