Hello. Thank you for contacting the Toolset support.
If you edit your view (assuming you are using classic view) with the "Search and Pagination" section of your view where you will find the shortcode: [wpv-control-distance]
With above shortcode you should try to locate the attribute: inputs_placeholder="Show results within %%CENTER%%"
You can change your text as required with this "inputs_placeholder" attribute.
if I add the inputs_placeholder="Show teachers within %%CENTER%%" parameter it adjusts the label before the filter, but it removes the distance selector. See attached.
All I want to do is customize the label preceding the filter.