Advanced Techniques › Display Levels

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Display Levels

The level number shown in the upper right corner of the display indicates how many display levels are active. When you enter the END command, the display terminates and the active display at the previous level reappears.

A home state is a display that remains active (that is, it continues to occupy a display level) until you explicitly terminate the display with an END command. Therefore, entering a command or requesting a new display from a home state level always creates a new level, incrementing the level number by one. The same action from a non-home state results in a new report replacing the existing report without adding a new level.

A home state is automatically created for the Dump Index display, the Dump Tree display, and any display created by entering a command (or a line command) from either of those displays. The Dump Index display is always level one. When you select a dump from the index, the Dump Tree for the selected dump appears as the level two display. Selecting any item from the tree or entering any command on the command line from the tree results in a level three display. These are automatic home state levels.

Use the HOME command to create a home state level for any other display.

Examples

From the Dump Tree display (home state level two)

  1. Select the Abend Summary report from the Favorites folder.

    The report appears as level three, also a home state because it was selected from Dump Tree display.

  2. Type SYMBOLS to display the currently defined symbols. A new level (four) is created for this display because it was created from a home state.

    Level four is not a home state because it was not created from either the Dump Tree or the Dump Index display.

  3. Type STATUS to display the product status. Notice that the STATUS report replaces the SYMBOLS report in level four.

Note: Pressing the END key returns you to the previous level (three), which contains the Abend Summary report. The SYMBOLS report is no longer active, having been replaced in level four by the STATUS report.

In this example, to force the SYMBOLS report to be a home state:

  1. Type HOME while viewing the report.
  2. The STATUS report now occupies a new level (five).

Note: Pressing the END key from the STATUS report returns you to the SYMBOLS report.