Hi Danny, I'm not really sure that is such a universal limitation...

But it is not unusual to see things that were originally designed a while ago to be limited to 256 items or sometimes 65536 items.

The reason for these particular numbers is that a single byte of information can hold one of 256 values, and 2 bytes of information can hold one of 65536 different values.

Back when memory was very tight, data was often trimmed down to only take up as little space as possible, so for example your system decided to use only one byte to hold the layer index of an object which made it only possible to have 256 different possible values (ranging from 0 to 255).

- Michael