[Lizard]

Templates will save you time by having all the common tasks pre-listed, but there is no way to create a drop-down list for task durations.
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One of the best ways to figure out if OmniPlan will work for you is to try it. If you just download the app, you can use it for small projects (less than 20 tasks) for free. You can also request a one-day license to try OmniPlan with larger projects. Free trial licenses are available from our online store.