Description:
In LibreOffice writer there is the toggle formatting marks functionality which can be activated by pressing Ctrl+F10 or using the icon in the menu. After activating all non printable characters are displayed. I suggest to add the same functionality for impress.
Due to the nature of impress I think when activating this function, this should apply to all text fields, so that these non printable characters are displayed (e.g.:¶).

Steps to Reproduce:
1. Open impress and insert some non printable characters
2. Go to Insert --> Formatting Mark
3. Select one of the available options there
4. Repeat steps 2 to 3 to add more non printable characters as desired
5. Try to make them visible.

Actual Results:
Currently in impress no function is available to view these non printable characters.

Expected Results:
Use a function (e.g. as in writer) to make the non printable characters used to format the text inside a text field visible.


Reproducible: Always


User Profile Reset: No



Additional Info:
Version: 7.1.8.1 (x64) / LibreOffice Community
Build ID: e1f30c802c3269a1d052614453f260e49458c82c
CPU threads: 8; OS: Windows 6.1 Service Pack 1 Build 7601; UI render: Skia/Raster; VCL: win
Locale: de-DE (de_DE); UI: en-US
Calc: CL

also tried:

Version: 7.3.0.2 (x64) / LibreOffice Community
Build ID: f1c9017ac60ecca268da7b1cf147b10e244b9b21
CPU threads: 8; OS: Windows 6.1 Service Pack 1 Build 7601; UI render: Skia/Raster; VCL: win
Locale: de-DE (de_DE); UI: en-US
Calc: CL