Have you seen those nifty slides which are appearing all over LinkedIn? If you head over to Canva, pop in some text into a Instagram post template, export to a PDF - job done. Sort of. This post is a carousel with tips on how to design one so you can avoid the most common mistakes.

Do you have an PSD that won’t open? Have you ever wondered when you should use a JPG instead of a PNG? Here’s a quick guide on what file type and where to use it.

How you direct the question and handle the responses matters. How you feel about it matters too. After all, this is putting your brief to your designer to the test. How well do you know your clients?

How do you know which is best for the work you’re doing? In general, there are graphics formats suitable for printing which have a higher resolution and those for on-screen viewing or online publishing. Within each group, there are also formats that are better than others for the same task. Here’s the Hello Lovely run down on file types.