There is not exactly anything that is a “global” variable. The best way to do this that I have found is to define another formula column. Then put the desired value there.
Not sure what you mean hear. Can you give more details?
Make sure that the column summary is visible. Click on it. Set the formatting. The column summary can now be hidden, if desired.
As for #2 I want the conditional formatting to be, for an example:
If column a is between 80 and 100 I want it Yellow. I guess I can workaround with a formula column that uses IF statement, just wondered if there’s a way to do it straight forward.
The simplest way to get there is to basically define a color for all values. The last condition that matches is the one that is used. So, the following would be one way to do this: