You can also set options in iPhoto's Preferences window that affect how the display pane looks.
From the iPhoto application menu, choose Preferences () to open the Preferences window; you can find display preferences in both the General and Appearance panes (Figure 3.7 and Figure 3.8).
Figure 3.7. Use the Sources settings in iPhoto's General preference pane to control the Last Months and Last Rolls albums, and the display of the item count next to source names.
Figure 3.8. The Appearance pane of iPhoto's Preferences window provides settings that control how iPhoto draws and scrolls through photos, and the size of source name text.
Display preferences you can change: