some typos, add p about client permalinks

documentation/user-guide/downloading.rst

@@ -26,7 +26,7 @@ minimize unnecessarily used bandwidth:
 * Projection selection
 
 Note that the download size in WCS is restricted in order to not block the
-service. Clients are advised to download bigger coverages in junks and but them
+service. Clients are advised to download bigger coverages in chunks and put them
 together afterwards.
 
 The final chapter :ref:`sample_requests` holds a list of sample requests against

documentation/user-guide/searching.rst

@@ -84,7 +84,7 @@ addition to the general search parameters:
 =============== ================================================================
 Parameter       Description
 =============== ================================================================
-``uid``         Filter on identifiert
+``uid``         Filter on identifier
 ``cloudCover``  Cloud cover filter. Either a specific value or an interval of
                 values. Values between 0-100
 =============== ================================================================

documentation/user-guide/web-client.rst

@@ -378,6 +378,19 @@ buttons on the right panel of the web client can be used.
    :alt: Web Client - Download multiple products via WCS
 
    *Web Client - Download multiple products via WCS*
+   
+Saving session
+--------
+Web client allows to save some parts of its current state by setting the
+URL search parameters. That enables to revisit the same view in time and space later on or share the direct
+link with someone, overruling the default client setup. Please note that certain characters
+are automatically URL encoded, as URLs sent over the Internet only use ASCII character set.
+This means that if user manually enters for example **:** sign, while entering the website,
+it will automatically transform into **%3A**, making the url less readable.
+
+* Pre-set map position by setting **x**, **y** as parameters of the center of the map and zoom by **z** parameter. `Example of such query <https://vhr18.pdas.prism.eox.at?x=15&y=50&z=9>`_.
+* Time selection is set by `timestart` and `timeend`, and should be entered in as ISO 8601 UTC time format without milliseconds. `Example of such query <https://vhr18.pdas.prism.eox.at/?timestart=2017-12-31T17:32:45Z&timeend=2019-01-01T00:00:00Z>`_.
+* In case only one main layer is configured (like in the Emergency collection), additionally custom filters can be saved via their name. In order to investigate this option, the fastest way is to use the filter manually within the client and copy/modify the url parameters. `Example of such query <https://emg.pdas.prism.eox.at/?eo:cloudCover=0,50&geo:uid=urn:eop:EUSI:EW03:104005000FDC5200:058979092010>`_.
 
 The following chapters describe the services offered for :ref:`viewing`,
 :ref:`searching`, as well as :ref:`downloading`.