1) open tab format
2) click on style
3) adjust the size of the window
4) the window disappears and it is impossible to find it
This has been reported many times including #276404: Format > Style window is too large where there is a proposed fixed. It should be included in 3.1 in a couple of weeks when it's released.
In the future I suggest that you use the French forum located at https://musescore.org/fr/forum where there are plenty of people helping. The issue tracker is for reporting new bugs and is supposed to be in English.
Comments
Google translation:
1) open tab format
2) click on style
3) adjust the size of the window
4) the window disappears and it is impossible to find it
This has been reported many times including #276404: Format > Style window is too large where there is a proposed fixed. It should be included in 3.1 in a couple of weeks when it's released.
To fix it try https://musescore.org/en/node/287862.
In the future I suggest that you use the French forum located at https://musescore.org/fr/forum where there are plenty of people helping. The issue tracker is for reporting new bugs and is supposed to be in English.