In some designs, you may need to measure the minimum distance between:

An example of this is if you have a conductor span passing above another conductor, as shown below:

In this scenario, you might want to ensure that the top conductor when 'Hot' doesn't get too close to the lower conductor when it's 'Cold'.

With the Clearance Measure tool we can easily find the minimum distance between two conductor spans under any environmental conditions:

When this tool is selected the Perspective and Profile views will show, in a series of color-coded dotted lines, the conductor models for all different Environment scenarios. The Display Environments section of the Properties panel shows the environments available as well as a legend for the color of each. From this section you can enable or disable which environments are displayed in the views while using the tool.

Note that the first option is considered the default option and cannot be disabled. You can Modify an Environment, including their colors, in the Environments tab.

After selecting the tool, left-click on both of the conductor spans you want to measure the distance between. They will highlight and a magenta line will be drawn to show the clearance.

The distance between the two conductor spans is shown in the properties panel as well as next to the magenta line:

When you exit the tool, any dotted lines appearing in the Profile view will be driven by the Environments enabled in the Environment tab.

You can also use the Clearance Measure tool to measure the distance between anything two points, by left-clicking on each of them.