The yellow/red icon for clients is a configurable measurement. The setting is dependant on what the network admin views as the threshold for bad / okay / good coverage.
Since I don't currently have a 7.2 AMP up and running, I'll give the location for AMP versions 7.1.2 and 7.5.5 - this will reflect the 2 locations for the preference settings.
In 7.1.2:
1. Navigate to VisualRF
2. drill down to any floor plan
3. pull down the 'Display'
4. in the 'Options' group -> select Change QuickView prefs (icon is a file with a gear, bottom left in the options group)
5. A preferences view should pop up, expand the 'configure preferences for' drop down -> select Users
6. Here, you can enable / disable the feature by checking / unchecking the box next to signal strength; or adjust the sliders left or right to what makes sense for your deployment.
7. Once done, close the preference screen -> the setting change should have been saved on the fly as you made the change
In 7.5.5:
1. Navigate to VisualRF
2. In the top right of the network view, select the 'preferences' icon *(icon is a file with a gear, between site tree and help icons)
3. A preferences view should pop up, expand the 'configure preferences for' drop down -> select Clients
4. Here, you can enable / disable the feature by checking / unchecking the box next to signal strength; or adjust the sliders left or right to what makes sense for your deployment.
5. Once done, close the preference screen -> the setting change should have been saved on the fly as you made the change
I've attached images for where the Preference icon is located.