IOctops / How to change a design theme in a mind map?

By the way, note that themes in IOctopus are not only about a design, but also about an interface so that it doesn't hurt your eyes. - For higher concentrations - standard blue - For seamless insertion into presentations and documents - with a white background - Dark blue - a nighttime theme to make your eyes more comfortable - There is a soft watercolour theme - A technical dark grey - And a grey one for emptiness and meaninglessness Online mind map service IOctopus: https://ioctopus.online/ Try the demo without registration: https://ioctopus.online/demo