12/8 and 4/4

[Herakles]

What is best solution to get the bars aligned whilst keeping both time signatures?
12/8 barline should align with barlines of 4/4 and have ‘triplets’ (regular eight notes in 12/8) over quarter notes in 4/4.
I saw this explanation but maybe there’s even a faster way?

12/8 in a 4/4 meter

You can fake that (and Ligeti didn’t invent it, J S Bach and his contemporaries were already writing that way.) To enter a time signature on one staff only, use the popover and press Alt-Enter not Enter. The trick is to create a time signature of 12/8 with a pickup bar that matches the length of the 4/4 bar (enter 12/8,8 in the popover) and then change back to a hidden 4/4 time signature one bar later. You still need to use hidden tuplets, of course. Since pickup bars in Dorico can be longer …

[Derrek]

I searched “12/8 4/4” to find this old post, which seems to be the best summary of how to give the result you wish.