15.
Do you want to create a flyout that contains custom commands. Then follow these steps:

Step 1: Create a toolbar that contains custom commands you want

a) Right-click on a space between buttons on a toolbar, and then click Customize.
b) In the Customize dialog box, Toolbar tab, click New.
c) Enter a name for the toolbar, for example, CustomTools.
d) Choose the Menu Group under which you want to save the toolbar.
e) Click OK. A new toolbar is created.
f) In the Customize dialog box, Commands tab, and select All Commands.
g) Drag the commands you want to the toolbar.

Step 2: Create a flyout from the toolbar

a) In the Customize dialog box, Commands tab, select User Defined.
b) Select the User Defined Flyout and drag it into the drawing area. A new flyout is now created.
c) Right-click on the new flyout, and then click Properties.
d) Click OK to close the AutoCAD warning that displays.
e) In the Customize dialog box, select the CustomTools toolbar (the toolbar you created in Step 1 above).
f) Click Apply and Close.

The flyout is created with the commands you selected.