Exporting to other formats
OmniPlan can write files in several formats, for use with other applications. To export an OmniPlan file, choose Export from the File menu. When you export, a new file is created, leaving your original document as it is on the screen. Of course, not all aspects of an OmniPlan document can be represented in all file formats. (If you're working in tandem with others, consider Publishing and Subcribing.)
If you export a project while a filter is on, only the visible tasks are included in the exported file.
OmniPlan 2
Of course, OmniPlan can export to its own format. This is useful when you want to use the filtering feature to make a new OmniPlan file of tasks matching certain criteria.
OmniPlan 1
OmniPlan 2 can export either the document as a whole or just the filtered contients to a format OmniPlan 1 can work with.
iCalendar
This is the calendar format used by Apple iCal, Apple Calendar, and many other calendar applications. You can choose to export the tasks as calendar events or as items on a to-do list. If you export calendar events, you can also choose whether each task should become to a single event, regardless of how long it may be (One event per task), or whether tasks should be broken into chunks when they span working and non-working hours (One event per work period).
Comma Separated Values (CSV or CSV UTF-16)
CSV is a common, plain-text format that can be read by many different applications.
If you're having trouble persuading other applications to read the non-ASCII characters in your CSV file, such as accented letters or non-Roman characters, try exporting with the UTF-16 CSV option, and importing that into the other application. This makes it easier for some applications to detect the correct encoding and interpret your characters properly.
Microsoft Project Exchange (MPX)
MPX is an older compatibility format that can be read by Microsoft Project 2002 and earlier, and written by Microsoft Project 98 and earlier. This format doesn't support the Unicode character encoding standard at all, and is in general less reliable than the Microsoft Project XML format. See the Microsoft Project support section for a list of the compatibility limitations.
Microsoft Project (XML)
Microsoft Project 2002 and newer can read and write this format. This is the best choice for compatibility, if you have a version of Microsoft Project that supports it. See the Microsoft Project support section for a list of the compatibility limitations.
PNG Bitmap Image, PDF Vector Image, TIFF Bitmap Image, JPEG Bitmap Image
You can export a picture of the task view or the resource view, whichever one is open in the main window. In the Export panel, you can choose whether the image should include the outline, the chart, or both.
OmniOutliner 3
The task outline is exported as an OmniOutliner file, with a column corresponding to each column in the OmniPlan document.
OmniGraffle
There are several ways to export to an OmniGraffle diagram.
Work Breakdown Structure 
Tasks and groups are represented by a tree of objects. The connection lines in this diagram type represent the hierarchy of the task outline; dependency lines are not represented.
Activity-on-Node PERT Chart 
Tasks are represented by objects, connected by dependency lines. While a Gantt chart emphasizes durations, this type of chart emphasizes the path of dependencies.
Activity-on-Line PERT Chart 
Tasks are represented as lines between objects, with the title and duration of the task as a label on each line. Like the Activity-on-Node PERT Chart, this diagram type emphasizes dependencies.
When exporting to a Work Breakdown Structure or an Activity-on-Node PERT Chart, you can choose whether to represent tasks with basic objects (which just show the task name) or with tables (which show the task name, assigned resources, start date and end date).
If you own an OmniGraffle license, you can style and edit exported diagrams. But even if you don't own it, you can use an unlicensed copy of OmniGraffle (available at www.omnigroup.com) to view, print, or export the diagrams.
HTML Full Report
A folder is created containing a full report of the project, including:
An overview index page
A task list
A resource list
A Gantt chart
A resource timeline
An iCalendar file of the project milestones
iCalendar files with each resource's tasks as events
iCalendar files for each staff or equipment resource's tasks as to-do list items
If you know HTML and CSS, you can also make your own HTML templates.
HTML Task List
This is just the task list part from the HTML Full Report; it exports as a single HTML page.
HTML Resource List
This is just the resource list part from the HTML Full Report; it exports as a single HTML page.