We recently added the ability to add tables to a page. This is currently in beta, but we are planning on some improvements to this feature soon.
Adding a table is super easy, just click the insert button on the left side of the page you're editing and select the option to add a table.
Here's what that process looks like:
To add extra columns or rows just right-click and make your selection:
Click into individual cells with your cursor to move between them. Within any cell you can type text or add other elements such as images, styled text and hyperlinks. For now, the best way to add images into a table is by copying and pasting them in, (rather than trying to upload an image).
If you want to get a bit more fancy with your tables, you can create and embed an Airtable. Click "Embed" on a Tettra page, and drop in the URL: