Hippo CMS 7 allows you to pick image in cms editor from Image gallery using hippogallerypicker add- on .
Hippo Gallery picker can be configureed to display custom height and width of custom image. Confgiuration can done at
‘/hippo:namespaces/hippogallerypicker/imagelink/editor:templates/_default_/root’
by changing properties of preview.width and preview.height.
