To define what to show in your sidebar for Linchpin Touch, please go to Confluence Administration → Linchpin Touch → Layout & Content → Sidebar & Footer.
Think of the sidebar as your main navigation for people using the touch display. Theoretically you can enter as many menu entries as you wish. Please note though that the sidebar is not scrollable right now, so you'll want to check if all of your items are visible without scrolling.
When starting from scratch, you'll find a sidebar named "default sidebar" waiting for you. If you will be using personalization features, you might end up having more than one sidebar. That's why those sidebars have names, so you can tell which is which. For now, start by clicking on the edit icon on the right.
You are looking at your sidebar menu structure now. On top, there's a button to add new menu elements as well as a field for the sidebar's name. You can change that, if you like. It's just for your eyes, regular users looking at the touch device won't see the name of the sidebar.
The main part of the screen shows the structure of your menu. For now, there's only one element with no information attached to it.
On the right side you see the different fields for adding information to a menu element:
Caption: That's the piece of text your users will read. It's the only mandatory field for menu items.
Link: A link to the content you want to be shown if somenone clicks on the menu item. You can enter a page title from your Confluence (and will be helped by an autoselect dropdown) or you can paste or type in an external link starting with http://... The link is optional: if this entry is just kind of a category that folds out its sub-items, it doesn't need a link of its own.
Zoom: Maybe you want to connect a menu item with a zoom in on one of the four quadrants of the main area. Here you specify where it should zoom to: one of the quadrants, zoom out to the complete view or no zoom at all. Default is no zoom.
Finish your editing by clicking on the button "Save menu item" on the right side. You have to save this element first (or cancel your editing), before you can start editing the rest of the sidebar menu.
Add as many items as you need and order them via drag & drop. A menu item can have sub-items, but sub-items cannot have sub-items of their own.
In this example we have three menu items: one of them functions as a category ("Corporate Information"), while its two sub-items refer to specific Confluence pages. As you can see, there are small icons on each element, giving a quick indicator if there's a link or a zoom defined. Hover over these icons with your mouse for a tooltip showing more information, or simply click on the element to show all the information on the right-hand side.
Also you'll notice a three-dots icon on each element. This lets you add new elements above or below the one you clicked, so you can save a little time. If you add new elements by clicking on the button on top of the page it will always be added at the bottom of your menu structure.