Please revise as follows:
(1) Why does character background color change from transparent when I change the font size to 60? Is that some style setting that is kicking in? If so, how and where can I turn it off?
(If you have two questions, you should open 2 topics)
1: It shouldn't! Changing font size will never change font color. I assume maybe text increased up to 60 (pts?) could be oversetting your text frame. Please note that Inserting screenshot may help other members to help you.
2 : Choose New Paragraph Style from the Paragraph Styles panel menu
see here for complete documentation: Apply paragraph and character text styles in Adobe InDesign
Thanks, very helpful as always.
I found a default background color setting for the paragraph style in question, and corrected that. Still remaining, however, is a colored, vertical stripe to the left of the text box containing text just entered. Where does that come from, and what is it called, so that I can get rid of it? I really have no idea how it could have got there in the first place. It is almost like these authoring tools have "minds" of their own!
Still remaining, however, is a colored, vertical stripe to the left of the text box containing text just entered.
Is your vertical stripe blue ?
If so, I guess "Style Override Highlighter" feature is on.
You can turn it off in the Paragraph style panel.
Otherwise, please provide a screenshot. (but I'm pretty sure that's it ^^)