If you want to add images to your pages, you can do so in three ways:
Drag and drop the image to the page editor. Tettra will automatically upload the image.
You can also use the insert controls feature to add an image. Either click the add icon to the left of an empty line, select Image, and pick the image you want to add from your files, or drag and drop an image directly.
You can right click on images and choose Copy Image, then in Tettra, select the location you want the image to appear, and either use the paste shortcut (CMD/CTRL + P) or right click and choose Paste.
To delete an image on a page, simply click on the image, then delete as you would delete text ([delete], [backspace], etc.).