<span class="colour" style="color: rgb(85, 85, 85);">i want to build Castellated holes/ half-holes in Easyeda What tools do I need to create?</span>
<span class="colour" style="color: rgb(85, 85, 85);">can you teach me be video or image thankyou. I am not good at English</span>
Brand new interactions and interfaces. 
Easy to use and quick to get started. 
