Your custom components look kinda dumpy by default. The pins are all cramped together, and they just look like featureless rectangles (with a little notch in the top, to make it look like a real computer chip, haha). But you can change it!

How to edit a circuit’s appearance

While editing a component’s circuitry, go to Project > Edit Circuit Appearance. For example, let’s say I’m editing a circuit with 3 inputs and 1 output. This is how it looks in the “Edit Circuit Appearance” window:

Wow, it’s really small. Just like on the circuit view, zoom in using the control in the bottom-left.

That’s better. Here’s what some of the symbols mean:

Here’s what you can do with the arrow tool:

The other tools along the top are pretty self-explanatory. It’s a mini art program. Whee!

My ALU is a bear, your argument is invalid.


Don’t put the pins in the middle of, or outside, the component. It just looks weird and is hard to understand.

Put them on the sides where they make sense. The convention is for inputs to be on the left/bottom sides and outputs to be on the right/top sides.

Always make sure that all the sides of rectangles are “on the grid.” This avoids Problems. For example, these are both rectangles not aligned with the grid. See how you can see the gray dots next to the right side? That’s not good.


If they’re not aligned to the grid, it can cause issues with selecting and moving the component around on the main circuit.

Double-space your inputs and outputs if you want to be able to put tunnels into them side-by-side. Put them every other grid cell, like this:

Now you can put tunnels into them right next to each other on the main circuit:

Be aware that if you move the pins around, you will have to reconnect them on the main circuit!