Arist delivers lessons over several delivery methods, and each one has its own rules for length, text formatting, images, and video. This reference collects every limit in one place so you can plan around them while you write. The editor keeps you inside the hard limits as you type and flags anything still to fix before you schedule the course, so knowing the numbers up front is about shaping a lesson rather than repairing one.

Images are the exception. Those checks cover your text and structure, not how a picture will render, and each delivery method handles what you upload a little differently, so an image can reach a learner cropped, as a still frame, or as a link instead of an embedded image. Follow the guidance in section 4, and preview a lesson on the delivery method you are sending over before it goes out. See Previewing and Testing Content.

Each part of a lesson has its own limit. The editor shows a live counter under the field and stops accepting characters at the limit, so you can't overrun one by accident.

Every line break counts as two characters against these totals, so count two for each one when you plan a body of several short paragraphs.

Bold and italics use different syntax on each delivery method, so match your markup to where the course will deliver.

A web address counts against the character limits in section 1 exactly like ordinary text, so one long URL can crowd out most of a lesson. The content editor's link shortener trades a long address for a compact link on Arist's own arist.link domain.

You open it with Actions > Shorten link in the content editor. What you paste can be any length, because what comes back is always that domain plus a short code. Start the address with http:// or https://.

For the walkthrough, including copying the finished link before you close the window, see Using the Content Editor.

A few rules keep images sending properly, and none of them involves resizing anything yourself.

Those rules cover the upload. Each delivery method then renders what it receives a little differently, and a few have their own ceilings worth designing around.

You can add video to a lesson by uploading a file or linking a public platform, and learners see a preview above the message.

WhatsApp is stricter than the editor about how much text can travel alongside an image. This one is a recommendation, not a limit: nothing stops you from going over, and the course still saves and delivers. The editor shows a warning banner with the length to aim for.

The banner appears when a lesson's body plus its first question's prompt go over a suggested combined length, and that length depends on the type of that first question:

Every answer option you add to a multiple choice question reserves 4 more characters, and the editor rounds the figure down to the nearest 10, so it keeps stepping down past eight options. You never need to do this math yourself. The banner names the exact number for the lesson you're editing.

The recommendation exists to protect your images. Once the message WhatsApp actually sends reaches 1,024 characters, WhatsApp can no longer deliver the lesson's image inside the message, so learners receive a link to the image instead. The suggested lengths above sit just under that threshold, which leaves room for the question prompt without pushing the image out.

When you translate a course, the Translate flow's SMS/WhatsApp Compliance toggle keeps translated text inside these lengths for you. See Translating an Existing Course.

Beyond character limits, WhatsApp restricts what can deliver at all.