Forum Moderators: phranque
?
Open the document, got to View->Structure. Select the font tag you want to amend or delete. If you want to delete it, got to Edit->Transform->Remove font. If you want to get rid of the size, but leave the font in place, then go to Attribute->Size and then choose "Remove attribute".
Long-winded, but you can guarantee not being left with hanging "/font" tags or similar.
But, if you have to do it one at a time, using the "view structure" method I suggested is probably the fastest way. It's also the least dangerous, in that you're not going to be left with invalid HTML because of problems caused within the chair-keyboard interface (highly likely when doing a boring, repetitive task).