CreateTOTALLY can crop images dynamically based on a master crop selection during resizing using alpha channel saved with the file. When an imported graphic includes more than one path or alpha channel, you can choose which alpha channel to use for the clipping path with image tagging.
Create a screenshot of the master crop with all page items. See example below.
Create alpha channel mask in Photoshop image
How to create a master crop in a Photoshop image as an alpha channel.
Add screenshot of the master crop to the master image as a new layer. You can simply do this by dragging the screenshot of the master crop file from its saved location on to the master image in Photoshop.
If the screenshot of the master crop file is smaller than the original image you will need to resize using the Transform tool. A box will appear around the layer with boxes in the corner. Click and drag those boxes to change the size.
Resize, drag and drop your master crop image until it’s exactly the right size you want, and in the correct place, in relation to the original photo. Hit ‘Enter’ when you’re happy with its size and position. This will keep it locked in place.
Tip: To check the correct size and position of the master crop layer use blending mode: Difference
To save a master crop selection as an alpha channel. The Alpha channel stores the selection as an editable grayscale mask in the Channels panel.
at the bottom of the Channels panel. A new Alpha channel appears which is the master crop that will be used by InDesign during resizing. Please save document.