You are more than welcome, vivienrk. Glad to hear that you figured it out. There are many symbols you can click on to get menus or options. I’ve always considered Bryce as some sort of an adventure game. Click on everything and get surprised.
Not only that, don’t just click, Try Alt-click and such. (I learned this from a David Brinnen video.) For example, hold ALT, then click on the Create Tree icon. You’ll see a list of tree files not available from just clicking on the Create Tree without the ALT.