Several display preferences for the dialogue nodes can be set by selecting the Tools | Preferences... menu option and choosing the dialogue Node Setup tab as shown below.

Sections of the dialogue information that is shown on the node may be hidden by toggling the various check boxes, or a preset may be loaded by selecting from the drop-down list.  The remaining options affect the size of the dialogue node:

Auto Size Node To Dialogue Contents

Each dialogue node will be set to the preferred width, but the height will be based on the length of the dialogue text.

Preferred Width

The width that you would like all dialogue nodes to be set.

Preferred Height

The height that you would like all dialogue nodes to be set unless they are auto sized to the dialogue contents.

Minimum Height

When auto-sizing the dialogue node, it will not be allowed to be smaller than this height.

Maximum Height

When auto-sizing the dialogue node, it will not be allowed to be taller than this height.