When you're song-writing, you sometimes encounter "syllable mismatch", when (for example) a beat that covers one syllable of a lyric in verse 1 covers two in the corresponding place in verse 2. One way of indicating this is to use a dotted tie between (say) two consecutive quavers, which in this case would be sung as a crotchet in verse 1 and two quavers in verse 2. Sibelius supports this feature, but so far as I can see MuseScore does not.
Select the tie, open the inspector (F9) and change the Line type to dashed or dotted as appropriate.
In reply to Select the tie, open the… by mike320
In reply to *F8 by jeetee
Yes, F8, F9 is the palettes.