I’ve got an odt file (not written by me) in which there are tiny frames with invisible text after section headings (and also after table and figure titles). When I type Ctrl-A in such a frame (to select all) and copy the text, I get the section number followed by “.0” (e.g. “3.5.2.0”). When I double-click inside the frame, I get a dialog box “Edit Fields” with information like
- Type: Number range
- Select: Subclause
- Format: Arabic (1 2 3)
- Value: 0
What is the purpose of these frames?
I could not find any information. So I’ve asked both Mistral Le Chat and ChatGPT, which suggest that this is either for cross-referencing anchors or automatic numbering (but could not find any documentation). However, automatic numbering works without such frames, and if I remove such a frame, linking to the corresponding section still works.
The main issue with these frames is that when line numbering is active, I get a “1” on the left of each frame (as frames have their own line numbering), i.e. which appears over the section heading.