промежуточный. сворачивание деревьев проекта по тестовой кнопке. думаю положить сворачивание в настройки компактности.

.idea/workspace.xml

@@ -7,6 +7,10 @@
   </component>
   <component name="ChangeListManager">
     <list default="true" id="e42177c3-2328-4b27-8a01-35779b2beb99" name="Default Changelist" comment="">
+      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/Common/GlobalProperties.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/Common/GlobalProperties.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/Common/UI/Menus_2023/MainMenuBar/MainMenuBar.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/Common/UI/Menus_2023/MainMenuBar/MainMenuBar.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/Visual_DVM_2021/UI/Interface/ProjectWindow.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/Visual_DVM_2021/UI/Interface/ProjectWindow.java" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/src/Visual_DVM_2021/UI/Main/ProjectForm.form" beforeDir="false" afterPath="$PROJECT_DIR$/src/Visual_DVM_2021/UI/Main/ProjectForm.form" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/src/Visual_DVM_2021/UI/Main/ProjectForm.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/Visual_DVM_2021/UI/Main/ProjectForm.java" afterDir="false" />
     </list>

properties

@@ -35,6 +35,7 @@
   "CheckTestingIntervalSeconds": 10,
   "EmailOnTestingProgress": false,
   "collapseCredentials": false,
-  "collapseFileGraphs": false,
+  "collapseFileGraphs": true,
-  "collapseFileMessages": false
+  "collapseFileMessages": true,
+  "collapseProjectTrees": true
 }

src/Common/GlobalProperties.java

@@ -100,6 +100,8 @@ public class GlobalProperties extends Properties {
     public boolean collapseFileGraphs = false;
     @Expose
     public boolean collapseFileMessages = false;
+    @Expose
+    public boolean collapseProjectTrees = false;
     //-
     @Override
     public File getFile() {

src/Common/UI/Menus_2023/MainMenuBar/MainMenuBar.java

@@ -1,6 +1,8 @@
 package Common.UI.Menus_2023.MainMenuBar;
 import Common.Current;
 import Common.Global;
+import Common.UI.Menus_2023.ECButtonPosition;
+import Common.UI.Menus_2023.ExpandCollapseButton;
 import Common.UI.Menus_2023.MenuBarButton;
 import Common.UI.Menus_2023.VisualiserMenuBar;
 import Common.UI.UI;
@@ -14,6 +16,7 @@ public class MainMenuBar extends VisualiserMenuBar {
     JMenu analyses;
     JMenu transformations;
     MenuBarButton components;
+    public ExpandCollapseButton RightECButton;
     public MainMenuBar() {
         addMenus(new LastOpenedProjectsMenu());
         addPasses(PassCode_2021.OpenCurrentProject, PassCode_2021.CreateEmptyProject);
@@ -65,6 +68,13 @@ public class MainMenuBar extends VisualiserMenuBar {
             }
         });
  */
+        add(RightECButton = new ExpandCollapseButton("область деревьев проекта", ECButtonPosition.Up) {
+            {
+                addActionListener(e -> {
+                    UI.getMainWindow().getProjectWindow().SwitchProjectTrees();
+                });
+            }
+        });
         //---
         ShowProject(false);
     }

src/Visual_DVM_2021/UI/Interface/ProjectWindow.java

@@ -77,4 +77,8 @@ public interface ProjectWindow {
     //-
     void RefreshTabsNames();
     void FocusVersions();
+    //--
+    void CollapseProjectTrees();
+    void ExpandProjectTrees();
+    void SwitchProjectTrees();
 }

src/Visual_DVM_2021/UI/Main/ProjectForm.form

@@ -26,8 +26,7 @@
             </properties>
             <border type="none"/>
             <children>
-              <grid id="7bb8d" layout-manager="GridLayoutManager" row-count="1" column-count="1" same-size-horizontally="false" same-size-vertically="false" hgap="-1" vgap="-1">
+              <grid id="7bb8d" binding="projectBackground" layout-manager="BorderLayout" hgap="0" vgap="0">
-                <margin top="0" left="0" bottom="0" right="0"/>
                 <constraints>
                   <tabbedpane title="Файл: -" icon="icons/Generate.png">
                     <tooltip value="Код"/>
@@ -41,11 +40,7 @@
                 <border type="none"/>
                 <children>
                   <splitpane id="68abc" binding="SC3">
-                    <constraints>
+                    <constraints border-constraint="Center"/>
-                      <grid row="0" column="0" row-span="1" col-span="1" vsize-policy="3" hsize-policy="3" anchor="0" fill="3" indent="0" use-parent-layout="false">
-                        <preferred-size width="200" height="200"/>
-                      </grid>
-                    </constraints>
                     <properties>
                       <dividerLocation value="650"/>
                       <dividerSize value="3"/>
@@ -65,7 +60,7 @@
                         <border type="none"/>
                         <children/>
                       </grid>
-                      <grid id="45a5e" binding="projectBackground" layout-manager="BorderLayout" hgap="0" vgap="0">
+                      <grid id="45a5e" binding="projectTreesBackground" layout-manager="BorderLayout" hgap="0" vgap="0">
                         <constraints>
                           <splitpane position="right"/>
                         </constraints>

src/Visual_DVM_2021/UI/Main/ProjectForm.java

@@ -43,6 +43,7 @@ public class ProjectForm implements FormWithSplitters, ProjectWindow {
     private JPanel analysisFormPanel;
     private final JScrollPane FastAccessScroll;
     private JPanel projectViewPanel;
+    private JPanel projectTreesBackground;
     private JPanel projectBackground;
     ProjectMenuBar menuBar;
     //-
@@ -61,7 +62,7 @@ public class ProjectForm implements FormWithSplitters, ProjectWindow {
     public ProjectForm() {
         LoadSplitters();
         //-
-        projectBackground.add(menuBar = new ProjectMenuBar(), BorderLayout.NORTH);
+        projectTreesBackground.add(menuBar = new ProjectMenuBar(), BorderLayout.NORTH);
         arraysFormPanel.add((arraysForm = new ArraysForm()).getContent());
         functionsFormPanel.add((functionsForm = new FunctionsForm()).getContent());
         analysisFormPanel.add((analysisForm = new AnalysisForm()).getContent());
@@ -288,4 +289,28 @@ public class ProjectForm implements FormWithSplitters, ProjectWindow {
     public void FocusVersions() {
         projectTabs.setSelectedIndex(5);
     }
+    //--
+    @Override
+    public void CollapseProjectTrees() {
+        UI.Clear(projectBackground);
+        projectBackground.add(fileBackground);
+        projectBackground.updateUI();
+    }
+    @Override
+    public void ExpandProjectTrees() {
+        SC3.setLeftComponent(fileBackground);
+        projectBackground.add(SC3);
+        projectBackground.updateUI();
+    }
+    @Override
+    public void SwitchProjectTrees() {
+        if (Global.properties.collapseProjectTrees)
+            ExpandProjectTrees();
+        else
+            CollapseProjectTrees();
+        //---------------
+        Global.properties.collapseProjectTrees =!Global.properties.collapseProjectTrees;
+        Global.properties.Update();
+        UI.mainMenuBar.RightECButton.Switch(Global.properties.collapseProjectTrees);
+    }
 }