Take your map to the next cartographic level, Part 1
Working with legends—Help | ArcGIS for Desktop
Adding and customizing a legend in ArcMap - YouTube
Working with legends—Help | ArcGIS for Desktop
ArcGIS for Archaeologists: Practical 3
Removing white gap in ArcMap Legend? - Geographic Information Systems Stack Exchange
Tips and Tricks for Working with Legends in ArcGIS Pro
Creating a Map Layout from Start to Finish - All About Legends | Learn GIS
Raster enhancement: The horizontal legend
Working with legends—Help | ArcGIS for Desktop
Working with legends—Help | ArcGIS for Desktop
Working with legends—Help | ArcGIS for Desktop
ArcGIS for Archaeologists: Practical 3
Working with legends—Help | ArcGIS for Desktop
Working with legends—Help | ArcGIS for Desktop
Displaying representation symbology (lines with markers) in ArcMap legend? - Geographic Information Systems Stack Exchange
Removing white gap in ArcMap Legend? - Geographic Information Systems Stack Exchange
Working with legends—Help | ArcGIS for Desktop
How to adjust the legend in ArcGIS Pro - YouTube
How to improve legend spacing for ESRI ArcGIS map - Geographic Information Systems Stack Exchange
Working with legends—Help | ArcGIS for Desktop
ArcGIS 10.1 Legend Issue: Gap when using the "only show classes that are visible in the current map extent" - Geographic Information Systems Stack Exchange
Working with legends—Help | ArcGIS for Desktop
Creating a Map Layout from Start to Finish - All About Legends | Learn GIS
How to Make a Layout in ArcMap - YouTube
How to Add and Format a Legend on a Map Using ArcMap ArcGIS - YouTube