If we want to create UI action Form Button for Modal pop-up window in Custom Application which is created from App engine studio:
Follow Below Step to Reproduce it.
1) Go to System Definition >> UI Action >> New .
2) Go and fill out as below:
Note: I am Taking here example PlantWiki Button when I click on this button It will open modal pop-up window to show Wikipedia of current plant record
3) Now pass the value function name of our script in "OnClick field".
4) Now Write the script in workspace tab follow as below:
Note : Make sure to write script only in workspace relate list tab. If you want this classic UI you should to write script in main tab.
5)Go and test it.
**Please let me know if it's not work**
#modalpopup
#UIAction
#button
#servicenowcommunity
#AppEngineStudio
