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Relative Layout is the default mode. This is a simple and effective layout mode that simply keeps a component's size and position constant relative to its parent container, even when the parent container grows or shrinks. More precisely, it remembers the component's position and size as a percentage of its parent's bounds at the last time the window was saved. Relative Layout also has the option of scaling a component's font appropriately.
Note, that Relative Layout mode respects aspect ratio. So if the parent component is distorted, the contents will not be. The extra space is distributed evenly on both sides of the contents.
By default, font scaling is enabled on all components, but it can behave differently on some components so it’s good to test it out before putting it into production. You can change the default Component Layout settings in Project Properties under Designer > Window Editing.
When individual components are dragged into a window, the following default Layout settings for each component are applied. All components on the window default to font scaling.
When individual components are grouped together, the default Layout settings are applied to the new group component, and to each component in the group. All the components in the group default to font scaling.
Font scaling on individual components in a group can be disabled by selecting the group, and double clicking on a single component. You will get a red outline around the group, then you can select the individual component(s), and disable font scaling. Note: The individual component font scale setting takes precedence within a group.
When you remove the group (right-click and select Ungroup), all the individual components within that group will get reset to the default Layout settings including font scaling, even if font scaling was set differently.
You can convert a group to a container to change the way scaling works. Ignition remembers the last Layout Settings you made to each individual component in that group prior to the conversion to a container (i.e., if any of the components had font scaling disabled, once the group is converted to a container, those same components will still have font scaling disabled).
Anchored Layout lets you specify various "anchors" for the component. The anchors dictate how far each of the 4 edges of the component stay from their corresponding edges in the parent container.
Anchored Layout Options
For example, if you anchor top and left, then your component will stay a constant distance from top and left edges of its parent. Since you didn't specify an anchor for the right or bottom sides, they won't be affected by the layout.
If you anchor bottom and right instead, the components will again stay the same size (since you didn't specify an anchor for their other edges, but they will stay a constant distance from their parent's right and bottom edges.
Of course, you can mix and match the various modes for the different components in a given container. The following image shows the following: