Marker, grid, and segment display

  •   MARKERS      This submenu has three (sometimes four) items:

  •   SHOW MARKERS / HIDE MARKERS     Toggles the display of markers in the plot area (if the screen is large enough, there is button for this in the upper right corner of the plot area).

  •    INSERT MARKER(S)        Lets you insert additional markers into a file (beyond those entered when the data were acquired in LabHelper).  A window opens asking you to pick the letter of the new marker. Having done that, you move the cursor to the plot area and click on the location where you want to put the new marker.

    The "»" and "<<" buttons are for the standard interpolation markers; "»" indicates the start of a segment of interpolated data and "<<" marks the end of the segment. These may be used to avoid including interpolated data in many analysis operations. Interpolation markers are (optionally) set automatically by the 'REMOVE REFERENCES' and 'SPIKE REMOVAL' procedures in the EDIT menu, but you may occasionally need to insert them manually.

    When done (or when you want to change the marker letter), go back to the 'Insert new marker' window.

  •    REMOVE MARKERS IN BLOCK        Eliminates all markers from within a selected block.

  •    EXPORT MARKERS        Makes a .csv text file contining all of the file's markers, with the associated sample number, elapsed time, and real time.   Standard marker characters (R, S, ¶, », «) are labeled with their associated event type (e.g., begin and end reference, begin and end interpolation, etc.).

  •    SHOW REAL-TIME NOTES      If the data file contains any real-time notes (Warthog binary or Sable ExpeData files only), this will output them to a text file.
  •   GRIDS AND SEGMENTS   This option has a submenu with four selections that control the display of dotted lines in plot windows, zero lines, screen segment indicators (the latter is only applicable if the file has more cases than the number of horizontal pixels in the plot window), and time segment indicators.  Note that for very large files, the screen segment indicators are switched off for clarity, but you can switch them back on from this menu.   Also, you can show screen segments or time segments (or neither), but (to avoid screen clutter) not both.
         Note: many of these changes do not take effect until a new channel is drawn.

    SHOW GRID LINES     Toggles the display of horizontal grid lines in the plot area.

    SHOW ZERO LINES     Toggles the display of a horizontal line showing the value of zero in the plot area (if the data include zero).

    SHOW SCREEN SEGMENTS     Toggles the display of vertical lines indicating 'screenwidths' (segments of the data that each contain a number of samples equal to the number of horizontal pixels in the plot area).   These lines only appear when in 'entire file' display mode and the file contains more samples that the number of horizontal pixels in the plot area.  You can shift between screen segments with the 'slider' at the bottom of the plot, or with the left and right arrow keys.

    SHOW TIME SEGMENTS     Toggles the display of vertical lines showing the time of day in hours.

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