Pictures are inserted in the library then in the topic editor. This provides a way to use the same picture multiple times and modify it from the library without the need to find it in the topics. To insert a picture, either:

• From the "Home" ribbon tab, click the "Add item" button in the "Library" group and choose "Add picture". Then drag the picture from the library in the topic editor
• From the "Insert" ribbon tab, click the "Insert picture" button then "Insert another picture". This will add it to the library prior to inserting it in the topic editor

When a picture is clicked in the topic editor, the "Picture tools, format" contextual ribbon tab is shown to modify the picture's properties. From there, it is possible to:

• Replace the picture with another one
• Reset the picture properties such as size and alignment
• Align the picture in the text flow
• Adding the picture's alternative text: this is used in HTML based documentation as a place-holder text while the picture is being loaded
• Specify the picture's width and height

See the How to add an item to the library step-by-step guide.