U can use some of these tips to format/edit ur blog..

https://steemit.com/steemit/@scrooger/pimp-your-post-2-or-formatting-and-editing-your-blog-made-easy-or-cheat-sheet-included-or-just-copy-and-paste

I did not use other editor to resize my collage photos. Just the app I mentioned earlier.

I hope the link above will help..😉