Sometimes,
I would like «tie forced» on the same note exp.:
«C half (tie) to C quarter» instead to get a dotted Half as result,
…or a «G half (+ tie) to G quarter (+) G eight» instead to get a «double dotted half»
What is the way to achieve this ?
…also get «three eight rest» instead of «one dotted quarter rest» ?
I guess you can find your answers to achieve this using, in Configuration mode, the options (wheel at the bottom of the screen) — in french you choose “groupement de notes”, it’s the first in the menu, and then you play with those. I achieved your first question by changing the second line (Notes commençant sur un temps…), I chose the first option (diviser aux limites des temps).
In general you should experiment with the settings in Notation Options before you resort to using Force Durations, as using Force Durations ties Dorico’s hands when it comes to editing the music later on, preventing it from having the freedom to renotate the music exactly as it thinks would be best.