Some questions about 3 functionalities

[Crusader2010]

Hello! I would like to know if it's possible to do the following things (and how!):

1. to memorize the panel split ratio upon starting Multi Commander (e.g. if I set it to 25/75 I want it to always be like this unless I change it; same thing with a "custom" size - by mouse dragging)
2. to expand the folder tree (when the tree view is visible in a panel), on mouse double-click (NOT on single click = selection). I've tried making a user command but the only thing about the tree view is hiding/showing it.
3. to save different column layouts for each open panel

Thanks

[Mathias (Author)]

1. Menu > Configuration > Core Settings > Layout (Tab)
"Panel Tab" section
 There is a setting named
 [.] Remember split size between restart(*)

There are limits to the splits size it remembers.. 0/100 will not due.. but 25/75 as you ask for should work.

2. Menu > Configuration > Explorer Panel > Dislapy (Tab)
Scroll a bit down and there is a "Folder Tree" section
You got an option there you can disable then it will not expand folder in the tree when selection it
But it will not expand on double click. you have to click the

• to expand and browse in from the filelist for it to autoexpand

3. You can change the default column layout and you can also create Multiple layout that are auto used form different path.
But you can not lock a layout to a panel.
Right click on column header to find all the options for layouts and for creating and changing layout.
(It is also possible to change column sets from script.)

[Crusader2010]

Thank you for the answers!

1) Sorry, i must've missed this option when looking over every tab 
2) Is it possible to add an "Expand tree" functionality that we could incorporate into user commands?
3) Similarly, is it possible to add an option to differentiate column layouts between panels? (not for specific paths, but in general = globally).

PS: for number 2), can this be done from scripts?

Thanks again!