To share your promo code on Instagram:
Go to Menu >> Marketing Tools
Click Social post creator
Select Promotion from the social post menu
Choose the promo code you wish to promote from the menu
Play around with the image, colours, layout, text and background until you're happy with your image. You can change the format between post or story in the layout section
To edit the text or font, simply click the text on the image or press text in the bottom menu
Press save in the top right hand corner to save it to the photos on your phone
Share post on your socials
If none of the pre-set colour themes are right for your socials, then you can make your own theme. When you get to editing your social post
Click Colour
Then Custom theme
First of all, choose your background colour by dragging your finger over the colour picker
You can then also make the shade of the colour you choose lighter or darker using the line dial at the bottom of the screen
Click Save Theme
Next, you'll need to choose your Primary colour. Find where to do this on the top right hand side of your screen. This will form the colour of your font. Choose your desired shade the same way you did for the background
Click Save Theme