ArcGIS Pro layout legend not filling box

[YusefSamari]

When I click 'Insert Legend' on a layout on ArcGIS Pro, I draw a box around where I want the legend to be, but the actual legend never fills the box, as in the image below that shows the box I drew and the resulting legend. In this case, the text of the layer name is being cut off. Changing the height and width in the element pane of the legend just resizes the box, not the legend itself. The only thing that seems to change the legend size is adding new layers, but I don't know why it is automatically setting a size that doesn't accommodate the text here. Does anyone know how I manually change the size of the legend itself, or set it to automatically accommodate the text?

[Eugene_Adkins]

Working with legends in Pro can be a little tricky until you get used to it. For fitting strategies, check out this ESRI documentation. It believe it will help you with this problem.