- \item Start by shrinking the projector to $z=0,500$ ($\frac{1}{4}$ of the original frame).
- \item The next step is to switch to the camera and note that the green box has assumed the size of the projector, i.e.\ the red box. The value of $z$ of the camera is always equal to $1,000$ (default) but the frame is $\frac{1}{4}$ of the original frame, i.e.\ it has the size of the projector that has $z=0,500$. This is the current viewport size.
- \item You enlarge the room bringing $z=2,000$. You can see that the dimensions of the viewport (green box) do not change, remaining the same as those of the projector. However, the frame has been enlarged and this variation is indicated by the enlargement of the yellow box. Let's remember that this follows the changes made with the camera tool.
+ \item Start by shrinking the projector to $z=0.500$ ($\frac{1}{4}$ of the original frame).
+ \item The next step is to switch to the camera and note that the green box has assumed the size of the projector, i.e.\ the red box. The value of $z$ of the camera is always equal to $1.000$ (default) but the frame is $\frac{1}{4}$ of the original frame, i.e.\ it has the size of the projector that has $z=0.500$. This is the current viewport size.
+ \item You enlarge the room bringing $z=2.000$. You can see that the dimensions of the viewport (green box) do not change, remaining the same as those of the projector. However, the frame has been enlarged and this variation is indicated by the enlargement of the yellow box. Let's remember that this follows the changes made with the camera tool.