You can upload the Product Images that you want to create/edit in DealPOS from your Instagram. To upload the product image from Instagram to DealPOS, you can follow the steps below:
Step 1. You can Add New Product and upload the images, click Upload Image

Step 2. Click Instagram, and click Connect to Instagram

Step 3. Log in to your Instagram Account

Step 4. Allow connecting Dealpos with your Instagram

Step 5. Choose an image product from your Instagram, click Upload

Step 6. Click submit to Create Product

Step 7. The product will be created with an Image uploaded from Instagram

Upload Product Image from Instagram Tutorial Video
You might like to read these related articles below:
You can resize the image resolution for your product's Image by following this article: Resizing Option For Uploaded Images
You can show the Thumbnail Images from the product in the sell menu, to show the thumbnail image you can read this article: Show Thumbnail Product Images in Sell Menu