Help me make layout

https://snippet.webix.com/gs8ywha2 ← This url is the page I am having trouble.

It seems that the height value of the left side menu is determined by the height value of the right form. How to make it come out to the maximum value regardless of the height value of the right form?
Just like when I set it to view : template (https://snippet.webix.com/041qrleu)

thx

just add a spacer to right layout or to form. it will extend its height to maximum.
https://snippet.webix.com/4tlgwsj3

sir intregal
really thx for your help.

Please solve another problem.
https://snippet.webix.com/6dsapm2c
It seems that the width of the area with (id=“content_view”) on the page is the same as the size of the button inside. I want to this size to max. What should I do??

you defined fixed width for button.
either remove fixed width or wrap the button into layout with extra spacer
https://snippet.webix.com/rvef2k9a

intregal
Thx . You are my mom