Making iOS 7
Q. I generally like iOS 7 on my iPhone, but I find the default system type a little too thin and hard to read, especially on certain backgrounds. Is there a way to change to another font?
A. Apple has included an option for a bolder version of the iOS 7 system font used to display text, menu settings and labels on the iPhone, as well as on iPads and iPod Touch media players. To switch to the bolder look, tap the Settings icon on the Home screen and then on the Settings screen, tap General.
On the General screen, tap Accessibility. In the Vision section of the settings here, tap the button next to Bold Text to turn on the feature and get a thicker look to the system font. The iPhone reboots itself if you decide to make this change.
The Accessibility settings also include a Larger Dynamic Type option that works with Apple's own apps like Mail and Notes. When you turn it on, you can drag a slider on the screen to select a more comfortable reading size for apps that take advantage of the Dynamic Type technology.
The iOS 7 software has other built-in tools designed to aid users with more serious vision impairments. These include settings for increasing the contrast for better legibility and a screen-magnifier function called Zoom. You can find more information on these features for iOS at www.apple.com/accessibility/ios.
Using a CD
With an Ultrabook
Q. How can I install my older software CDs on a new ultrabook that has no disc drive?
A. Investing in an USB-based external CD/DVD drive is one approach. You can typically find these drives around the Web for about $30 and they add other benefits as well, like the ability to make disc-based backups or burn audio CDs for the car.
If you have another computer with a disc drive, you have more options. In many cases, you can share the second computer's CD/DVD drive over the network. Specific instructions for doing so with your particular operating system are available around the Web.
Another method, if you do have access to another computer with a disc drive, is to copy the installation files from the disc to a flash drive or Secure Digital memory card that can be later plugged into the ultrabook.
This approach may not work for all programs on discs, but it may work for some.
TIP OF THE WEEK Losing your mobile phone or tablet can be less of a hassle if you have the data on it backed up online through services like Google Plus Auto Backup for photos, Apple's iCloud or Microsoft SkyDrive, but some people have bigger concerns about more sensitive personal information. Most mobile systems now include built-in software that can find your device on a map -- and even remotely lock or erase it to help protect your information.
Google recently updated its Android Device Manager service to now lock missing phones and tablets, as well as find and erase them remotely. To use or test the feature on an Android-powered gadget, log into your Google account at android.com/devicemanager.
Apple also stepped up mobile security in its new iOS 7 software with the Activation Lock tool, which is intended to prevent thieves from turning off the tracking feature or trying to resell the device; instructions for using the Find My iPhone service are in the company's support database at support.apple.com/kb/PH2697 and for the new iOS 7 Activation Lock at support.apple.com/kb/HT5818.
Microsoft has its own online service for Windows Phone owners to locate, ring, lock or erase their handsets remotely. Details for using the feature are on Microsoft's site at bit.ly/V56EBR . J. D. BIERSDORFER
Personal Tech invites questions about computer-based technology to QandA @nytimes.com. This column will answer questions of general interest, but letters cannot be answered individually.
This article originally appeared in The New York Times.