For resizing your images proportionally follow these steps:

1. Select your image and click the Selection Toolhttps://cdn.elev.io/file/uploads/Nx6j1ilgYkjKwwUzxKv9Jx2yWyIGUZG4VbEE9W71H30/pgN9yNIYy67QIagAPoWhPZcHj3UR-BzT53s4UcEjRRU/select--Xk.png or Free Transform Tool https://cdn.elev.io/file/uploads/Nx6j1ilgYkjKwwUzxKv9Jx2yWyIGUZG4VbEE9W71H30/wHiE9WI-PbELsqlQrAk5fUWPVIpYesoJoinBEwNRpnU/transform-ktQ.png from the left toolbar.

2. While pressing the Shift key, drag the stretch handles on the edge of the image to the size you want.

https://cdn.elev.io/file/uploads/Nx6j1ilgYkjKwwUzxKv9Jx2yWyIGUZG4VbEE9W71H30/y-VImfgE92sWujqUTNXcm_RUpVcLxPtHD7yQ2rTLUtE/, stertch  and rotate images-Mp0.gif

3. Save your page when you're done!