Open the Print Plus Widget.
Drag the Scale Slider to size the red box.
Whatever you see within the red box will get printed.
You can pan the map within the red box by clicking and dragging the map.
Close the Red Box
Press Advanced
The default DPI setting = 96.
Do not change this!
If you set this to anything higher, it will take forever to create the PDF.
Enter Author = OET GIS
Enter Copyright = © 2021 Maricopa County
Press Print
View the PDF = Flood Control Structures and Storm Drains.pdf
This is your PDF: