On the Files tab in the dialog box of the ribbon command File | Options 
, you can make settings for opening and saving files:
Template folder
Here, you can specify the folder in which the templates for new Presentations documents are stored.
The dialog box that appears when you choose the ribbon command File | New to let you select a Presentations template displays all templates that are in this folder.
Note: Normally, this setting should not be changed. Change it only in the event that you have actually moved the template folder to another place.
Bullets folder
Here, you can specify the folder in which the bullets for Presentations are stored.
Note: Normally, this setting should not be changed. Change it only in the event that you have actually moved the bullets folder to another place.
Default file format
Here, you can select the file format in which Presentations should save newly created documents by default.
If you create a new document with the ribbon command File | New and then save it for the first time, the Save dialog box always suggests the file format set here as default.
You can choose between the Presentations format, several versions of the Microsoft PowerPoint format and the RTF format.
Important: Note that the other formats offered here do not know all of Presentations’ functions. If, for example, you save a Presentations document in Powerpoint format, certain formatting options or functions could be lost. We thus recommend that you use the default setting "Presentations" here.
Saving section
In the Saving section, you can make settings for saving documents:
▪Prompt for summary information when saving
| If you enable this option, a dialog box will appear automatically the first time you save a new document to enable you to enter some additional information about it. For more information, see Document summary. |
Opening section
In the Opening section, you can make settings for opening documents:
▪Recently used files in File menu
If you click on the small arrow on the ribbon command File | Open  , Presentations displays a list of the most recently opened files. If you select one of these entries, the corresponding file will be opened immediately. Here, you can specify the number of files to be displayed in the list. |
Android/iOS only: Backup section
The Android/iOS-Version does not contain a "Backup" tab and its settings, which are described in the next section. Instead, you have to choose either No backup or Simple backup in the dropdown list on the "Files" tab.
▪No backup
| If you select this option, no backups will be created when documents are saved. (This option is not recommended.) |
▪Simple backup
| This makes one backup per document. It contains the previous version of the document. It has the name extension .bak and is in the same folder as the document itself. |
The Android/iOS version has also the following option for the Opening section above.
▪Auto recovery: Save state every ... minutes
| If this option is enabled, Presentations automatically makes a temporary backup copy of every opendocument on a periodic basis. You can enter a period of 1 to 100 minutes. |
Note: These temporary backup copies work completely independently of the Simple backup/No backup option described above.
| When you exit Presentations in the normal manner, these temporary backup copies are automatically deleted. However, if it is not terminated correctly (for example, due to a crash), Presentations will detect this the next time the program is started. It then opens (after prompting) the temporary backup copies of all documents that were open when the crash occurred and contained unsaved changes. |
| You can then check each of the restored documents to determine if any of the most recently made changeshave actually been lost, and then save them. |