global parameter in OpenStudio

Does OpenStudio have the function similar with "global parameter" in eQuest?

I have many windows with same height in a project. The window height will be changed frequently in the future. I think it is too time consuming if they have to be changed one by one many times. In eQuest, I usually create a global parameter and link every window height to that parameter. Then, I can just change one global parameter to change all window heights. Does OpenStudio have similar function?

OpenStudio does NOT have a global parameter function like in eQuest. Instead, OS has the ability for the user to write measures that can do pretty much anything. For your case, you can write a measure to change all the window heights. There is also already a measure that changes the window to wall ratio of your building on the Building Component Library found here BCL Window Measures

Here is a good resource for learning how to write measures: OS Measure Writing Guide