1st post - take it easy on me! 
In the attached, you will see that I have a Box integration aside a Google Map integration. There is a good bit of unused space between the two and I would like to modify the HTML to make better use (by both of the aforementioned add-ins) of the space.
If I inspect element the āblank spaceā, I see that the field in question has a width value of 12.5%. If I āedit attributeā to 5% and an commit the change, I render a desirable result.
How do I change this in the source code?
Many thanks!