How to change Google Map Height in standalone Venue View?

Dear all,

According to this post:
www.joomlaeventmanager.net/forum/jem-2-1-x-for-joomla-2-5-joomla-3-community-support/9287-make-google-maps-bigger
-> I can successfully change the height of the google map in the Event-Venue View:

However, how to do the same for the standalone Venue View?
-> which file should I work on?

Thanks for any kind of help!

I finally find that the map height in Venue View can be set in this css file: JoomlaFolder/media/com_jem/css/googlemap.css

so to avoid being overwritten when upgrading JEM, make a copy of googlemap.css and rename it to googlemap_custom.css
-> change the map height to 350px and upload it back to the folder: JoomlaFolder/media/com_jem/css/
-> i.e.: JoomlaFolder/media/com_jem/css/googlemap_custom.css

Then goto JEM backend -> settings -> layout
-> look for "Custome Sheets" on the right hand side -> "googlemap.css" -> click on "Yes" button
-> then in the empty box below, put the custome css file path: media/com_jem/css/googlemap_custom.css
-> save the settings
-> That's it!