1. Image Size: Images within a tweet will be displayed at a 2:1 ratio, with the recommended upload size of 1024 x 512. Any image with a larger height proportionally will be cropped on the top and bottom when shown in the feed (but shown in full when clicked on). Sometimes, intentionally hiding portions of an image could be used for creative effect. But as a general rule, it is best to keep any important information within the boundaries of a 2:1 rectangle.
2. Image Tagging: You can now tag people directly in a photo which in return allows you to use the entire 140 characters for your message! This feature allows for a more social and interactive experience.
3. Text on Image: Adding text to an image is not only a good way to attract the eye, but also a way to extend your message beyond the 140-character limit. If you do not have the resources for a graphic designer, tools like Pablo by Buffer or Phonto (downloadable application) offer an easy solution for simple text overlay on images.