Make sure that the 3D layer (in the Layers panel) is selected (active).
1- To access the 3D mesh settings and properties, you’ll need to open two panels: The 3D panel, and the Properties panel (both found under the Window menu).
The 3D panel has all the components of the 3D scene, and when you click the name of any of those, you’ll be able to access its settings in the Properties panel.
You can expand/collapse the 3D panel tabs by clicking the samll arrow next to the tab's name.
2- Select the mesh name in the 3D panel. Then, in the Properties panel, click the "Edit Source" button to open the Type (text) layer's file.
3- You can then enter a new text, change the font, the font size, or whatever other settings you want to change. When you're done, save the file (File -> Save), then close it (File -> Close).
1- In the 3D panel, select the Current View tab.
2- You can click the Coordinates icon at the top of the Properties panel, then add numerical values for the camera angle.
3- Or, you can move the camera around in the scene using the Move Tool. When the Move Tool is selected, you can choose one of the 3D Modes that appear to the far right of the Options bar, then click and drag in an empty area of the scene to move the camera.
1- The Lights are found down the 3D panel. When you select a light, you can modify its settings in the Properties panel.
2- Again, you can enter the Coordinates values if you like.
3- Or, you can use the Move Tool's 3D Modes to move the lights around.
Select the mesh name in the 3D panel. You can use the Coordinates icon in the Properties panel, or pick the Move Tool, then use the 3D Axis.
The arrows at the ends of the axis move the mesh, the part below them is used for rotation, and the cubes are used for scaling. The cube in the center is used to scale the object uniformly. All you need to do is click and drag the wanted part.
Go to 3D -> Snap Object to Ground Plane to make sure that the 3D mesh is not floating around in the scene.
Then, go to 3D -> Render. The rendering might take a while. But you can stop it any time by clicking anywhere inside the document.