Exporting an iPhoto Library to Aperture Q. I'd like to do more fine-tuning on my digital pictures than the current version of iPhoto allows. I am interested in the Aperture software Apple also makes, but how hard would it be to import my existing collection into Aperture? A. If you are running the most recent version of Apple's iPhoto "11, it should be easy to move images to Aperture, a more advanced program.The two programs use a unified picture-library format. With the latest version of Aperture, you can open your iPhoto library without having to export and then re-import pictures. Certain iPhoto tools also work between the two programs, like the Places and Faces features, customized albums and pictures shared with social media sites. One thing you cannot do, however, is have a photo library open in both programs at the same time. Apple has more on using iPhoto and Aperture together at support.apple.com/kb/HT5260. Updating a Google Calendar Invitation Q. Can you change the time in a Google Calendar event after you've already sent it to people, or do you have to make a whole new invitation? A. If complications arise and you need to change the time, place or other details for an event you had scheduled with Google Calendar, you can edit the invitation even if it has been sent. Log into your Google account and go to your Calendar screen. Find the event you want to change, select it and click the "Edit event" link. On the page for that event, change the time, location and any other information that needs to be updated. You can also invite more guests, add a video call or request a timed reminder from Google so you remember the event yourself. When you click the Save button at the top of the page to seal in the changes, Google Calendar presents you with a pop-up box asking if you would like to send an updated invitation to your recipients. Click the Send button to notify your guests of the change. For those new to Gmail on the Web, you can send invitations for meetings and other events by first creating and addressing a message to your potential attendees. You can also create an invitation to accompany a reply or a forwarded message. When you have the addresses added, move the mouse cursor over the plus (+) button in the bottom toolbar and click the Insert Invitation icon, which looks like a tiny calendar. When the Invitation box appears on screen, fill in the details and click the Insert Invitation button to include it with your message. TIP OF THE WEEK Because several people in the same household often use the same Netflix account to watch their own favorite types of movies and television shows, the service's suggestions feature can get unfocused. To make its suggestions more tailored, Netflix introduced user profiles last month. Now, up to five different people can use the same account and keep their viewing preferences, Recently Watched list and reviews within their own space. To add a profile on the Netflix Web site, log into your account and click the triangle next to your user name on the right side. Select Manage Profiles from the menu and click the Add Profile button on the next screen; profiles can be deleted here as well. When adding a profile, you can also indicate that it is for a child under the age of 12. To switch between profiles, click or tap the menu button on the Netflix site or app and choose a different user.