I struggle with the text filter, because I would like to keep the same font size each and every time I use the filter, however the font size is dependant on the size of active area and the amount of characters and lines used in that area. So my suggestion is have the option to work with a fixed font size independent of the active area.
I know about the html option, but I prefer easy aligning etc. of the text filter.
[BTW. in order to update a changed font type, I had to save and reopen the project]