When you select to insert an image a dialog box will appear:
Clicking the folder icon will open the Responsive Filemanager to upload the image, then will return you to provide a description of the image and to specify the dimensions of the image:
When you select to insert an image a dialog box will appear:
Clicking the folder icon will open the Responsive Filemanager to upload the image, then will return you to provide a description of the image and to specify the dimensions of the image: