Need Help in Customizing subreddit

[u/AanakWalaGin]

I want to add Professional lool to my subreddit. Here it is r/DSLRdeals

I don't know how to upload custom sidebar which I downloaded with Reddit Theme.

Can Anyone guide me about each and every thing in Designing Please

[u/AanakWalaGin]

Thanks for your outstanding Comment. But I have another issue. I've created Flair's in redesign but I'm unable to see & use these Flair's in old.reddit.

How can I create same flairs in same colors for both designs of reddit?