First, make it possible to show non-printing characters in Impress.
And then create a toolbar button and relevant keyboard shortcut like in Writer.
LO 5.0.2 does not have this function.
Rationale: The possibility to view non-printing characters allows people to more easily weed out layout issues in text boxes.
It would be awesome if this made it into LO 5.1 or 5.2.
AFAIK, this functionality is not present in a major non-free presentation program.
FYI: Enhancements are tackled by volunteers thus we give no ETA's. There is almost no chance this makes it into 5.1 or 5.2 - it could be done tomorrow, it could be done never. It depends on a volunteer finding it interesting (amongst thousands of reports and enhancement requests).
*** Bug 99390 has been marked as a duplicate of this bug. ***
*** Bug 102249 has been marked as a duplicate of this bug. ***
*** This bug has been marked as a duplicate of bug 102249 ***
Consolidating over to the later duplicate bug 102249