Size of photo on my ipad mini

Hello everyone

I am currently on a 7 week photo journey in South East Asia . In order to travel light I left my apple book pro at home and I am travelling with my ipad mini

I have been using SNAPSEED for basic editing  of my images and there are some images I want to share on Facebook. In snapseed you have a direct button to share images on social network but I have an issue

the images are almost 4MB and I do not want to post such large images on facebook. i cannot find where I have the option to reduce the size of the images on snapseed

alternatively , I can also use PHotogene

Thank you for your help

Harold

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www.harold-glit.com
www.modelmayhem.com/haroldglit