Verify if the pre-requirements to build in a world are met and familiarize yourself with the basics for building.
Create reacts as soon as an object supporting this command enters your sight.
Activate reacts when clicking on an object.
Bump reacts when colliding with the object.
This can be done using the trigger sign
With the trigger texture or with trigger animate
With the trigger color
By applying a mask and using the trigger texture or using trigger animate.
With the trigger solid
With the trigger visible
With the trigger picture
With the trigger URL
With the trigger rotate
With the trigger move
With the trigger light
With the trigger corona
With the triggers sound and noise
With the triggers warp and teleport
An owner can authorise constructions in a world but could also disallow the usage of certain triggers like rotate or move.
Others only allow construction to citizens.
Others again could disallow any construction what so ever.
In case of problems, inform yourself with the owner or caretaker of the concerning world.
Only constructions made by a citizen (registrated mode) are protected and can't be deleted.
In tourist mode (not registrated), anyone can delete your constructions.