Evince lacks ability to track time and position in slides during presentation. It could have feature simmilar to mgp timer [http://member.wide.ad.jp/wg/mgp/].

Idea is to add edit option and widget as in #454731
Menu -> Edit -> Presentation
Presentation:
+==========================================+
||DUALHEAD\|Timer\                         |
|+---------+      \-----------------------+|
||                                        ||
||                                        ||
||[ ] Show timer during presentation      ||
||                                        ||
|| Estimated presentation time:_____min.  ||
||                                        ||
||                                        ||
|+----------------------------------------+|
+------------------------------------------+


And during presentation there should be small progressbar showing position in slides and countdown for actual slide (estimated time/number of slides) on the bottom of the screen.

Estimated presentation time should be savet in file metadata. something like metadata::evince::presentation::timer: on/off
metadata::evince::presentation::time: 30