If you want to edit an existing reminder, right-click on TimeLeft system tray icon and select in the pop-up menu My Reminders menu item to bring up the main TimeLeft window. In this window select a reminder you want to customize and press Edit button at the bottom of the window.

This will bring up Reminder Settings window.

Hint: there are two other ways to bring up Reminder Settings window.

1. Right-click on a reminder's countdown floating window and select Edit Reminder
2. Or just double-click on a reminder's countdown panel.

Reminder Settings window contains two tabs: Reminder and Countdown.

Reminder tab

Reminder tab is used to set reminder options such as the date and time it should run at, reminder window message etc.

If you want to enable the reminder, mark Enable reminder checkbox in the right-hand top corner of the window.

There are different types of reminders:
1) A reminder that runs only once at a specified time. Mark once radio button to enable this type of reminder and use date and time boxes to specify the date and time it should run at. Using Quick add button lets you select quickly a predefined time period (from 1 minute to any amount of week), the reminder should run in.
2) If you set reminder type to periodical (Minutely, Hourly etc.), it will run periodical alerting you at time intervals you specify.

Remind before field lets you specify how much time in advance of the event you should be reminded for the first time. The reminder will alert you for the second time when the event happens, and if you specify some time period in Repeat after field it will alert you at selected time intervals until you disable this reminder or until it meets Time bounds.

Multiple rules feature allows you to define more than one rule for your reminder. Just mark Multiple rules checkbox and add rules. Multiple rules feature is very good for complex events, like, for example, "Have a cup of tea every 2 hours and at 5:30 PM". In this case one rule would be "run reminder every 2 hours" and the other rule - "run reminder at 5:30 PM".

Reminder Message can be disabled/enabled by using Show Message checkbox. To specify Message Window view use Edit message link.
It is also possible to define different text for Remind Before and Repeat After alerts. In other words, you can substitute your message text for Remind Before and Repeat After alerts. For example: "Run reminder on 1/10/2006 at 4:00:00 PM. Remind before for 1 hour. Repeat after every 1 hour." In this case you can define 3 different messages: at 3 o'clock "There is 1 hour before tea time!"; at 4 o'clock "It is tea time!"; at 5, 6, 7 etc. o'clock "I hope, no one forgot about tea time!".
Note: "Remind Before" and "Repeat after" messages just substitute the main message, so the main message should be on if you want "Remind Before" or "Repeat after" messages to be displayed.

Sound section lets you specify a custom sound that will be played when the reminder runs. You can select any sound format supported by your system (most modern system support WAV, MP3 and MIDI formats, but it depends on your version of Windows and software installed).

Actions section lets you specify actions accompanying the reminder launch. You may specify an application that should be run or a document/link to be opened (more actions are also available: turn off monitor, shut down PC etc.).

Countdown tab

Besides of displaying a message or playing a sound, or running actions, reminder also can have its own floating countdown panel, so you can see at any moment, how long is left till the event. Reminder's countdown can be customized at the Countdown tab:

Countdown tab of Reminder Settings window lets you customize appearance and behavior of the countdown floating window.

Use Show countdown checkbox to show/hide countdown floating window. The reminder is running if Enable Reminder checkbox is marked, no matter if the floating window is displayed or hidden (it means that reminder message will be displayed, sound will be played and actions will be run if defined).

Countdown Title can be generated automatically from Reminder Message (see Reminder tab) or it can be defined manually. If you have several countdown timers it will be convenient to have an individual title for each of them (see Add a New Reminder). If you want to hide (or show) countdown title go to Edit layout link and remove (or add) title.

Layout. You can program your countdown to show Minutes and Seconds only or Months and Days. To change countdown layout select a predefined layout set from the Predefined drop-down list or click Edit layout link to customize countdown layout the way you want.

To select countdown Skin or Font select Skin or Font radio buttons. Note: there is no such a setting as Font Size. Font Size is calculated automatically on countdown panel resize.

Show border checkbox displays/hides countdown floating window border.

Effect link lets you select the transition effect for figures in the floating countdown window.

Change skin randomly on execute - if marked then the countdown's skin is changed randomly every time when reminder is executed. For example, if reminder settings are "Run reminder every 1 hour" then countdown will display some new (randomly selected) skin every 1 hour. Reminder message can be OFF.

Stop counting on zero is available for Once type reminder only (it is not available for any periodical reminders). By default Stop counting on zero option is OFF and when reminder reaches the event, it starts counting up. If Stop counting on zero is ON then the countdown will be displaying all zeros after the event is reached.