Custom Character Field (Liquid Crystal Display).Index
Summary
Specifies the index of the custom character
Description
Use this property to specify the index of the custom character.
LCD Screens allow usually 8 custom characters. Each character has a unique index, usually 0 to 7 .
You will need to also define the character in a separated "Define Custom Character" component otherwise the character will not be defined, and is likely to have random shape.