[Bug 163121] Add a toggle to make "Mouse pointer as pen" markings permanent or temporary

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=163121

--- Comment #17 from Aidar <aidar at outlook.com> ---
@Buovjaga, thank you for reproducing & registering Bug 163124 – “Context menu
for Mouse pointer as pen broken” with such an incredible speed!

---

@Heiko, thank you for soliciting the use case, here you go:

One reads the same presentation (same file) online to many different customers.
During the speech and Q&A, one uses incredibly useful “Mouse pointer as pen” to
draw attention to different parts of slides.
When the presentation is over, based on customer’s feedback, one can
rearrange/change things, rephrase statements, correct misprints, add new notes.
Then click Save.
Unfortunately, due to “Mouse pointer as pen” permanence, some slides in the
presentation may end up riddled with unnecessary PEN scribbles (that make it
unusable for the next customer), along with some useful abovementioned changes.

How does one cleanse the presentation from the unnecessary PEN scribbles that
were accidentally saved?

Is the share of users that likewise treat PEN scribbles as something temporary
sizable enough to treat this as a special case worth addressing?

---

The proposed solution with toggle would address the issue, because “unsavable”
temporary PEN scribbles would never end up saved in the presentation.

If there was a (optional) button that would cleanse the presentation from
“Mouse pointer as pen” scribbles (in one transaction, subject to standard
Undo/Redo), even if those scribbles had already been saved, that would also
address the problem. Though one would have to ensure that it is routinely
clicked, so that each new customer gets “fresh” presentation.

---

Perhaps, a great workaround for this use case would be ZoomIt utility by Mark
Russinovich (https://learn.microsoft.com/en-us/sysinternals/downloads/zoomit).
Since it is a separate onscreen drawing tool, its mouse drawings could never
get saved in the presentation. One has a choice:
- ZoomIt utility for temporary mouse drawings 
- “Mouse pointer as pen” for permanent drawings

That would satisfy @Buovjaga’s concern about those who’d rather their PEN
drawings saved.

---

@Regina, thank you for the screencast that demonstrates perfect “Mouse pointer
as pen” behavior. I compared the values in Slide Show Settings to mine and
found the culprit!

“Presentation display” is grayed out on your screencast, which likely means
that you have one (big) monitor.

I have three monitors: laptop screen and two external (with different
resolutions, if that is relevant). 

When I set “Presentation display” to “All displays”, Impress behaves perfectly,
with one new object (Polyline with 15 corners) per line, as in your screencast.

When I set “Presentation display” to any single display, tens of different
objects are created per “Mouse pointer as pen” line.

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