i convert all my books into ePub what used something like HTML. I know a little bit about html so i can fix errors. But its easier to do the job correct when converting the book in finereader. finereader can use colspan and rowspan in a table but i can't create that when i manually edit the table. When i create a new "line" that splits an existing row into two rows thats for the whole table.
because of my bad english: this is what i mean -> https://stackoverflow.com/questions/53503315/html-table-colspan-with-odd-number-of-rows (only the image is imported not the thread)