Adding Push Button parts
To add and remove items from the To-do list, you need to add two Push Button parts: 
1.	To add more than one part at a time, select the Sticky checkbox located just below the parts palette. 
2.	Select the 
Buttons category 

then select the 
Push Button part 

. Add a Push Button part within the window below the list box on the left and add one on the right. 
 a.	Notice that the mouse pointer remains a cross-hair, indicating that the mouse pointer is still loaded with the Push Button part. 
3.	Deselect 
Sticky or select the 
Selection tool 

from the toolbar to unload the mouse pointer. 
 4.	Change the left push button's text to Add and the right push button's text to Remove by directly editing them. 
Congratulations! You have just created your first user interface using VA Smalltalk. Next, you need to size and align the parts within the To-Do List Window. 
Last modified date: 06/18/2018