Mini toolbar, guided and smart modeling
Mini toolbar
The mini toolbar provides you with exactly the object symbols that can be linked to the selected object using a connection. You can use the mini toolbar in combination with Guided Modeling, but not with Smart Modeling.
Prerequisite: Smart Modeling is disabled:
Model tab bar > 
Modeling area > 
Smart Modeling
More information: Use the mini toolbar
Guided modeling
Guided Modeling (Show guides) provides lines and arrows that inform you about the orientation and distance of the items from adjacent items when you place or move objects and connections. You can use Guided Modeling in combination with Smart Modeling.
Prerequisite: Show guides (Guided Modeling) is enabled:
Model tab bar > Modeling area > 
Show guides
More information: Use Guided Modeling
Smart modeling
Smart Modeling provides automatic modeling features, such as creating a space for new objects, placing objects, and reconnecting connections. You can use Smart Modeling in combination with Guided Modeling.
Prerequisite: Smart Modeling is enabled:
Model tab bar > Modeling area > Smart Modeling
More information: Use Smart Modeling