You can perform simple conversions on any image asset, then make it available in a size and file format that you prefer.
To convert an asset:
Select the asset.
Click the menu below the asset (or right-click on the asset image), then choose Convert.
Choose the Output format for the converted file.
Set the Maximum dimension.
For portrait (tall) images, this is the height of the converted image (the width will be lower than this value).
For landscape (wide) images, this is the width of the converted image (the height will be less than this).
Extensis Connect will automatically download the converted file (or files) as
Assets.zip. The file can be found in your browser’s Downloads folder.