Rephrasing existing notes as tuplets

Is there a way to rephrase existing notes in a score into a tuplet?

I often find myself wanting to do this, whether it's because I've entered the notes already and forgotten to do them as a tuplet (usually a triplet in blues/jazz) or I'm working from a scanned or PDF sheet in which Musescore hasn't picked up the tuplet and has transcribed it as normal length notes with extra bits of beat in the measure to be corrected.

So, say you've already got three quavers in a row at the start of a measure (which is now 1.5 crotchet beats). If you want to rephrase that as a 1-crotchet-beat triplet of 3 quavers, it seems the only way to rephrase it is to convert the first note into a crotchet (the total time desired for the triplet) and then hit ctrl-3 to create the triplet, and then add in the other two notes again, AND replace the third original crotchet with the correct note and carry on.

Image shows an example of a PDF which has been misread by the converter by leaving out the triplets. I've drawn in where the triplets should be, and circled where Musescore has added in extra bass timings to show where there is surplus time that needs correcting. Manually converting the treble notes to the correct values should correct the bass timing, I can do that, but it's very time-consuming, it would be much easier if there were an option to select a group of notes and "tripletise" them, heheheheheh! Not only would that be much quicker, but it would also save having to remember what the notes were when reassigning the first one to a crotchet to create the triplet.

I do appreciate that it might be quite tricky to code this into the Musescore program, especially to cover this instance where it's not just 3 quavers that need converting, but two quavers and two semiquavers.

It's also rather awkward going to other way - having a triplet already in Musescore and wanting to convert that into normal-timed notes, e.g. you have a triplet of 3 quavers and you want that to be rephrased as 3 normal quavers. The only way to do that seems to be to select the bracket or the triplet "3" and delete the whole lot and start again, then you have to remember what the notes were to enter them again! It would be so much easier if deleting the triplet bracket resulted in doing that conversion for you rather than deleting all the notes. Yes, the timing would become 1.5 crotchets instead of 1 crotchet, and will need correcting but surely that's better than having the notes disappear altogether? :o)

Loving Musescore though! I used to use Sibelius and found it quite hard work, so I'm much happier with Musescore and use it for everything now.