doc: minor documentation fixes

doc/modules/ROOT/pages/install.adoc

@@ -38,11 +38,11 @@ image::install_blender_addons.jpg[Install Blender Add-ons]
 
 6. Setup add-on preferences if you are using a version of *Skybrush Studio for Blender* other than the free community edition:
 
-    API Key:: If you have received an API Key for communicating with the Skybrush Studio server, paste it here.
+    API key:: If you have received an API key for communicating with the Skybrush Studio server, paste it here.
 
-    License file:: If you have received a License file for communicating with the Skybrush Studio server, give its full path here to use it as your API Key.
+    License file:: If you have received a license file for communicating with the Skybrush Studio server, give its full path here to use it as your API Key.
 
-    Server URL:: Enter the URL of a dedicated Skybrush Studio server if you are using a dedicated server.
+    Server URL:: Enter the URL of a dedicated Skybrush Studio server if you are using a dedicated server. You can also click on the btn:[Use local server] button to use a server that is running on your own machine.
 
 === 4. Enable Online Access in Blender
 
@@ -58,7 +58,7 @@ If you are a community user, you do _not_ need to install the *Skybrush Studio S
 
 ==== 5.2 Cloud server for pro users
 
-If you are using a paid, professional version of *Skybrush Studio*, you will receive a license file upon purchase of the software. This license file shall be used as an API key that enables your pro features while using the cloud-based *Skybrush Studio Server* (see setup instructions above on how to use your License file as your API Key).
+If you are using a paid, professional version of *Skybrush Studio*, you will receive a license file upon purchase of the software. This license file shall be used as an API key that enables your pro features while using the cloud-based *Skybrush Studio Server* (see setup instructions above on how to use your license file as your API Key).
 
 ==== 5.3 Local server for VIP users
 

doc/modules/ROOT/pages/panels/safety_and_export/export.adoc

@@ -18,7 +18,7 @@ The Skybrush compiled show format is a single-file descriptor of your complete d
 
 * If you want to execute your drone show on your real drones, use *Skybrush Live*.
 
-If you press the btn:[Export to .skyc] button, you have to choose the path and filename of your output file. There are also some parameters you can setup conveniently:
+If you press the btn:[Export Skybrush SKYC] button, you have to choose the path and filename of your output file. There are also some parameters you can setup conveniently:
 
 Export selected drones only:: Export all or only selected drones
 
@@ -30,13 +30,13 @@ Light FPS:: Set the output frame rate for light programs (make sure it is a subm
 
 Export yaw:: Enable this checkbox to output rotations around the yaw (vertical) axis of your drone objects into the .skyc file
 
-== Export to .csv
+== Export to CSV
 
 The trajectories and LED light colors of the drones can also be sampled at regular intervals and exported to CSV files for further post-processing in external tools. This option appears only if you have installed and enabled the CSV export addon that is distributed separately. The CSV export will produce a single ZIP file that contains multiple CSV files, one for each drone, with the following columns: time (milliseconds), X, Y and Z coordinates (meters) and the red, green and blue components of the color of the LED light, in the usual 0-255 range.
 
 TIP: We recommend using Skybrush Live for drone show control, together with the official Skybrush Compiled Format (.skyc), as it contains a lot more information about your show in a more optimized way than this simple CSV representation.
 
-If you press the btn:[Export to .skyc] button, you have to choose the path and filename of your output file. There are also some parameters you can setup conveniently:
+If you press the btn:[Export Skybrush CSV] button, you have to choose the path and filename of your output file. There are also some parameters you can setup conveniently:
 
 Export selected drones only:: Export all or only selected drones
 
@@ -47,9 +47,9 @@ Frame rate:: Set output frame rate of drone trajectories and light programs (mak
 NOTE: Special characters in drone names are converted to standard characters in the exported filenames.
 
 
-== Export to validation .pdf
+== Export validation report
 
-The btn:[Export to validation .pdf] button creates a unique safety report of your show in .pdf format for standalone self-checking, validated reporting or as a supplement for flight permissions or other administration purposes.
+The btn:[Export validation report] button creates a unique safety report of your show in .pdf format for standalone self-checking, validated reporting or as a supplement for flight permissions or other administration purposes.
 
 The validation report starts with a summary of flight statistics and safety test results, and continues with detailed plots on all aspects of the implemented safety checks.
 
@@ -58,7 +58,7 @@ The validation report starts with a summary of flight statistics and safety test
 The validation .pdf is created by a local or remote instance of *Skybrush Studio Server* running in the background. As creating the validation report is resource intensive, access to this feature might be disabled on our public server and might be only available through a paid license option. If you need but do not have access, mailto:[email protected][contact us] for obtaining the proper *Skybrush Studio Server* license.
 ****
 
-If you press the btn:[Export to validation .pdf] button, you have to choose the path and filename of your output file. There are also some parameters you can setup conveniently:
+If you press the btn:[Export validation report] button, you have to choose the path and filename of your output file. There are also some parameters you can setup conveniently:
 
 Export selected drones only:: Export all or only selected drones
 

src/modules/sbstudio/api/base.py

@@ -118,6 +118,11 @@ class SkybrushStudioAPI:
     server.
     """
 
+    _api_key: Optional[str] = None
+    """The API key that will be submitted with each request. For license-type
+    API keys, the key must start with the string "License ".
+    """
+
     _root: str
     """The root URL of the API, with a trailing slash"""
 
@@ -153,7 +158,6 @@ def __init__(
             api_key: the API key used to authenticate with the server
             license_file: the path to a license file to be used as the API Key
         """
-        self._api_key = None
         self._root = None  # type: ignore
         self._request_context = create_default_context()