Thank you for the reply, Edward. The scrambling of special symbols and subscripts/superscripts that Kyungil and I observe is actually from using the text select tool to drag an excerpt from the PDF to the mind map, which is supposed to use OCR. I actually do not see the option to convert between Image and Text when I tap my excerpt, because the excerpt was taken with the text select tool.
My “workaround” was to use the rectangle select tool, which copies over the text excerpt as an image. However, this also copies uninteresting text before and after the desired excerpt on the same line since it is limited to selecting a rectangle.
What I wish could happen (as an alternative to developing OCR for characters such as Greek letters) is that the text select tool could be used to capture an image instead of selecting text.
As an example, let’s say I wanted to excerpt a portion of the text on these 3 lines:
Using the text select tool, the OCR will not recognize the Greek letters correctly and you might get something like:
If ov is the relative velocity of the fluid and solid at the interface, Navier had postulated that ov D Ls P, with Ls being a slip length characteristic of the solid and liquid.
Using the rectangle tool, extra words will be captured before and after the desired excerpt
Ideally, we would be able to exclude that from the selection like this:
The functionality would be to use the text select tool to capture an image of the text.