Hi,

I am using Version 3.9.0+180604 and I am trying to edit the logo that I have added to the top of my survey. Although I have managed to add it so it is visible in all viewing modes (including mobile), it is very small. Uploading a larger size image of the logo in the first place didn't help.
According to the manual I should change the size manually in the template.css but I can't see this option in my theme editor, only theme.css and custom.css

Any other ideas? Thanks!

you should edit custom.css
then:
stackoverflow.com/questions/40436285/bootstrap-navbar-logo-size
bootstrapious.com/p/how-to-change-bootstrap-navbar-height

In your theme editor select custom css and add the following

These are the default values from bootstrap. Change them to make your logo bigger. I used

.logo-container > img {

max-height: 120px;
padding: 9px;}