What do these "ticks" on the scrollbar mean?

[trantor]

I am wondering about the purpose of these @tstack ...

[tstack]

From the User Interface docs:

The right side of the display has a proportionally sized ‘scrollbar’ that shows:

• the current position in the file;
• the locations of errors/warnings in the log files by using red or yellow coloring;
• the locations of search hits by using a tick-mark pointing to the left;
• the locations of bookmarks by using a tick-mark pointing to the right.

[trantor]

Thanks