Pilot Charts

I found that you can get pilot charts displayed on qtvlm; found instructions and downloaded a folder of north pacific ocean charts. Was able to access and display on app but i have to activate raster mode in charts and if i magnify too much my other charts bleed through. Has anyone used pilot charts and found a way just to an individual pilot chart only? I use the command open one chart and get the pilot chart i want, but if i zoom in i get my regular raster charts. I right click and hit command close this chart and pilot and other raster charts close too.  Just wondering if i could reduce opacity of a chart or another command to fix this.