Normally the size is fixed. (800px * 550px). The initial design is what we see is what we get, so we make the overflow hidden.
However, I could help you to do it We would have to manually ssh to the controller and edit the login.tpl file ( if 2 controllers would have to go to each one ). Once that is done, the rest can be done from the gui:
1. Uncheck the “cached” checkbox and save the captive portal And also the WLAN (in case the login template still in the /tmp folder
2. export the file
3. Unzip the exported file.
4. There’s a gui.data file, change “height” of the claim widget,
5. zip those file into *.zip file
6. Import it again (Don’t save the editor again. Otherwise, the claim box will be moved up to fix the design box automatically)
I am also going to make a change request asking that the change gets added to the mainline code, to add the overflow property for each widget ( eg: the claim box ). In this way we could easily change the size and the overflow.