How to change the Attributes ( Level, Color, Style ....etc ) of multiple elements
The first step in changing the attributes of multiple elements is to select those elements to be changed, this can be achieved for example by using the Element Selection or Select By Attributes tool. See the Help documentation and other articles for assistances with this process.
Having identified ( selected ) the required elements for change here are a few methods to change their Attributes.
Drag Selection Box From Right To left
How to open Select By Attributes dialog in CONNECT Edition