Manually clean up any blank layers and delete them from the file - delete whatever layer the end user isn’t going to see
Select all sublayers and drag them to the first layer so they are all in the same level and not nested
Click on File → Export as→ PSD
Use "Artbox"
Where it says "Write layers" make sure to select all options = preserve text editability & maximum editability
Under Anti-alias options, select Art optimized Super sampling
Make sure the resolution is selected at 150ppi
Name and save the file
IN PHOTOSHOP
Open the new PSD file in Photoshop
Clean up the layer organization (Section 1, Section 2, etc)
**Group any image with adjoining shapes into one layer so they reduce proportionally on breakpoints (convert as smart object on photoshop, not 'flatten image')**
Click on Image → image size → enter size of the breakpoint needed (1200px, 480px, 320px etc) - ensure the width and height proportions are linked and set in pixels
Save the PSD
IN MAKER
Log-in to Maker
Create a new story
Give the story a title
Click on the PSD icon on the left side panel
Click Upload PSD
Select the saved PSD from your files
Once uploaded in Maker (please note: this may take up to a minute, while it's processing you will see a blue Uploading... button) click on "ADD"
Your PSD will now be uploaded to Maker
Refine the story and lock aspect ratio for all image / visual elements needed
Click on the breakpoint icon on the top right (device icon) and select Tablet
Make any adjustments or refinements needed on tablet