SysML, UAF, UML, and UPDM Profiles > SysML profile > Blocks > Ports, flow specifications and interface blocks > Flow port > Setting up a flow port as read only (SysML)
  
Setting up a flow port as read only (SysML)
By default, a new Flow Port is not set up as a read only.
To determine whether a flow port is set up as read only:
1. Open the Flow Port's Property Pages.
2. Click the Options tab.
3. If the Read Only check box is cleared, the Flow Port is not set up as read only.
If the Read Only check box is selected, the Flow Port is set up as read only.
To set up a flow port as read only:
1. Right-click the Flow Port, point to Set, and then click Read Only.
2. In the dialog, select TRUE to specify that the Flow Port is read only.
3. Click OK.
To set up a flow port as not read only:
1. Right-click the Flow Port, point to Set, and then click Read Only.
2. In the dialog, select FALSE to specify that the Flow Port is not read only.
3. Click OK.