All guides
How to build a brand colour palette that works
How many colours you need, checking contrast before sign-off, and why print and screen never quite match.
ReadPreparing artwork for print without a reprint
Resolution, bleed, colour mode, fonts and file format — the checks that catch expensive mistakes.
ReadSocial media image sizes, and why they keep changing
Design for how platforms crop rather than chasing a list of pixel dimensions that goes stale every year.
ReadWhich logo files to give a client, and why
The formats a client actually needs, what each is for, and the versions that stop the brand being misused later.
ReadHow to optimise images for a faster website
Size, format and compression — what actually reduces page weight, and the mistakes that undo the work.
ReadWhy these exist
The tools on Quezlo each do one job and explain that job on their own page. These guides are the other half: the decisions around the job, which no calculator can make for you. Whether a brand colour will survive being printed, how much bleed a leaflet needs, why an image looks soft after upload — these are the questions that come up in real projects, and the answers are the kind you normally learn by getting it wrong once.
They are written from working practice rather than assembled from other articles, which means they are opinionated in places and admit uncertainty in others. Where a guide touches on something a tool here can do, it links to it — but the guide stands on its own, and none of them exist to sell you anything.