@Negritude: thanks for the info. However, a sequence analysis program that in the free version does not even allow editing sequences (let alone sequence alignments and annotations), or the search for ORFs, or primer design, is hardly useful. I recommend "SerialCloner" which does a good job in my lab, and is really free.

Yes, this is exactly what I want - and what the description of your extension say it would do. This is why I'd like to have it:
In my work, I often need to read texts consisting of many paragraphs, and it occurs frequently that I am being disturbed, e.g. by a phone call, colleagues dropping in and asking me something, or simply by other work I do in parallel. Or imagine people with small kids ;)
Long story short I need to "keep track" of where in the text I am. Right now I use the mouse/trackpad to select the current paragraph or sentence. However, being able to zoom into this text would enhance my "tracking", and at the same time make the text easier to read. Zooming into "all similar text elements" just doesn't do the job for me.

I'll try it out and let you know. Not being able to save these settings is just fine for me.

unfortunately the new version still modifies the whole element, not only the selected text... But it is a clear step forward to be able to restrict the modification to a single element.