Changes from 4.6.6 to 4.6.7

• Add reverse (time domain) flattening in dynamic spectra
• Include the c source code to convert GRB UDS data to usable form.
• Modify UDS filename matching to allow wildcards to exist (e.g. in GRB names)

Changes from 4.6.2 to 4.6.6

• Convert HSIO to IDL to prevent problems with zlib versions on various Linux distributions.
• Miscellaneous bug fixes and enhancements.

Changes from 4.6.1 to 4.6.2

• Redesign the top-level and other menus so that they fit better on small screens.
• Add the capability to dump the screen image to a PNG or JPEG file.
• Rationalize log-plottability rules in derived streams.
• Miscellaneous bug fixes.

Changes from 4.6.0 to 4.6.1

• Modify code to allow datasets to have their own plot control objects. (Turns out that most of the "knock-on" changes are simplifications).
• Modify offsets handling so that stream offsets are stored in the stream and sector offsets in the dataset.
• Modify CLI procedures to accommodate the new plot control possibilities.
• Add spacecraft name to PAD axis titles.
• Create "Markers" that can be added to a plot.
• Modify SWOOPS SPEC file to ignore "quality" setting on the advice of Bob Forsyth.
• Add options to allow DISPLAY methods skip plot opening & closing.
• Bug fixes (many in dynamic spectra)

Changes from 4.5.4 to 4.6.0

• Complete restructuring of derived datasets, so that they no longer lock the dataset. The new derived streams structure has a "Rule" to allow the streams to be recomputed when things that used to be locked are changed.
• A calculator has been added for spect_datasets as well. (Does sector operations and stream-scalar only).
• Add restore defaults option to stream background settings.
• Some revisions of how sectoral homogeneity is determined to handle sector ratios & differences correctly under the new system.
• There is no longer any such thing as a locked dataset.
• Several short integers that should be long are fixed
• In the command line, FORM_RATIOS is replaced by RATE_CALC (there is also a SPECT_CALC as well).

Changes from 4.5.3 to 4.5.4

• Modify charsize handling for PAD plots
• Fix eps output for multi-page datasets
• Finally (I hope) get the handling of plot filenames right.
• Bug fixes
• Include Track map 12 (HISCALE post 2002/260 ish)

Changes from 4.5.2 to 4.5.3

• Users guide updated to make less reference to version 3.
• Provide a workaround for the IDL5.5 little-endian colour bug.
• Make display/hard copy more consistent -- display is now ALWAYS screen.
• Allow command-line retrieval of errors for rate & spect streams
• Modify the UDS instrument management so that (a) there can never be duplicate instruments and (b) it's easy to scan for new or updated SPECS.
• Add GRB UDS spec file. Also make the cadence floating point in the UDS wizard (it already was in the UDS_INSTRUMENT object definition).
• Provide means to convert all paths and plot settings to your local defaults (facilitating importing someone else's environment).
• Eliminate a common block (path_dirs)
• Bug fixes.

Changes from 4.5.1 to 4.5.2

• Modify pulldowns in top-level dataset menus (to make locate & other PP tools more accessible).
• Many bug fixes.

Changes from 4.5.0 to 4.5.1

• Add a new scaling mode for dynamic spectrum datasets
• Trap I/O errors on saving/restoring environments or datasets.
• Add descriptions of variables to common blocks.
• Cleaning up of how averaging is handled. In particular the way in which "don't be silly" conditions are handled.
• Bug fixes.

Changes from 4.4.0 to 4.5.0

• Locate methods (hs_plot and matrix_dataset) create a variable (default POINTS) at the top-level to contain the marked positions (only if your IDL version is >= 5.3).
• Fix some obscure mag scaling problems.
• Attempt to tidy up the get_idf_info API.
• Modify the colour choices in rate datasets so that sector-averages are black (when averages and individual sectors are chosen)
• Exclude the meaningless base/base or base-base sector from sector averages and differences.
• Make it possible to generate a new "clean" environment as well as restoring existing ones.
• Add a brief description of the class members to the object __define files.
• Dynamic spectrum datasets!
• ULEIS PAD plots!
• Swap rows and columns in PAD & SPECT stream editing menus.