Resizing Images
To optimize the speed of your website it is required to use images of an appropriate size. Images can be resized inline or by using the file manager. When using the image selection dialog, it is therefore possible and recommended to add the appropriate dimensions in pixels.
Inline
When using images within your Markdown content, it is possible to specify the required size the image should be resized to when inserting the image using the image selection dialog. However — you can add custom dimensions to existing image links by appending a query string to the file URL as follows:
The snippet above would resize image.jpg to a width of 400 pixels and a height of 300 pixels.
Note that only images stored on the server can be resized. If you want to resize a remote image file, you have to import that image first by using the import button in the files tab.
File Manager
The second option to resize images is to use the file manager. Just use the little dropdown of any image file and select Copy Resized to open the resizing dialog.