Propose to add a red line underneath a tab of those files that are modified

[Arthur]

Propose to add a red (or any other bright color) line underneath a tab of those files that are modified (pending save).

E.g.

[alex]

Hello Arthur,

the modified files already drawn in red text color. Why do you need also and underlining?
What I can see from you screenshot, lat file is not modified

Best regards,
Alex.

[Stefan]

For some peoples the difference is not easy recognizable,
so other tab-using-interfaces have an small dot or rectangle icon on the active tab.

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  Or have an contrast color for the tab back ground, or an underline under the tab text, or format the text in italic
  
  My active tab in firefox was set to kind of yellow

[alex]

In 2003 design, background color does not work.
So maybe only italic or underline. But I would delay this. Let see what Arthur will answer

[Arthur]

Yes, I do use the 2003 scheme, but probably I was not clear enough. The deficiency as I see it is in the fact that if the tab happens to have red/pinkish background and you have modified that file, the red colored file name is a very subtle [hardly visible] indication that you have changes pending saving (IMHO the asterisk * in the title window of HE is another weak indicator).
But the main point I wanted to tell you if you have AutoSave [I think] enabled it just saves the file and the colors are boom, gone after some time.
This is why I would like to add the line underneath the file name [tab bottom] which will indicate to me that the file has ever changed.

[alex]

So, you do not need to know that file is modified, but would like to know that file was at all somewhen modified during the session (can be already saved)? Something like modified and saved indicators for lines in document? Can you share the scenario when it needed?

Generally I do not like using of font style for indicating this (specially underline, for people this is strongly associated with link functionality, and in this context would be missused). Italic can be, but here is another small problem, size of the text would change and tab size will jump.
So from my opinion using of the color as indicator was best choice. But of course, in scenario with red tab this is hardly visible. Of course, for people who do not distinguish colors this would not be a solution.
I would think about this, and maybe add alternative (non default) kind of visualization, but currently this has low priority for me.

Best regards,
Alex.

[Arthur]

Yes, I would need some sort of an indication that the file has received changes either by the AutoSave functionality or intentionally [manually] during an active session.

The scenario could be as follows:
one opens a file already containing code and does a small change he/she is not certain yet about, the file gets Auto-Saved or saved by will, much later one can forget that the change was done and introduces unwanted changes into production.

Well, now I am thinking of a frame set instead of the line under.
Also is the AutoSave on by default? If so perhaps it is better to have it off initially.

[alex]

By default AutoSave is off.
There is no difference in result when AutoSave is executed or Save done manually.

one can forget that the change was done and introduces unwanted changes into production

In such cases I would suggest to not use AutoSave at all, or disable it for specific file (or enable for specific file). You can close HE not intentionally and would not see that change done, and have same problem.

[Arthur]

There is modified flag at the bottom status bar (between tab size and edit mode), I think we can employ it for such situations, can't we?

[alex]

Sorry Arthur,

can you explain in more details what you suggest?
How modified flag can be used for this?

[Arthur]

It can signify the fact that changes were applied since the session started (perhaps make it red), so in case the Auto Save is on it will indicate that a user has modified a file.