diff --git a/client/src/functions/modes/edit/auth_e.rs b/client/src/functions/modes/edit/auth_e.rs
index 24d3e57..f977a79 100644
--- a/client/src/functions/modes/edit/auth_e.rs
+++ b/client/src/functions/modes/edit/auth_e.rs
@@ -173,11 +173,7 @@ pub async fn execute_edit_action<S: CanvasState>(
             let num_fields = state.fields().len();
             if num_fields > 0 {
                 let current_field = state.current_field();
-                let new_field = if current_field == 0 {
-                    num_fields - 1
-                } else {
-                    current_field - 1
-                };
+                let new_field = current_field.saturating_sub(1);
                 state.set_current_field(new_field);
                 let current_input = state.get_current_input();
                 let max_pos = current_input.len();
@@ -191,7 +187,7 @@ pub async fn execute_edit_action<S: CanvasState>(
         "move_down" => {
             let num_fields = state.fields().len();
             if num_fields > 0 {
-                let new_field = (state.current_field() + 1) % num_fields;
+                let new_field = (state.current_field() + 1).min(num_fields - 1);
                 state.set_current_field(new_field);
                 let current_input = state.get_current_input();
                 let max_pos = current_input.len();
diff --git a/client/src/functions/modes/edit/form_e.rs b/client/src/functions/modes/edit/form_e.rs
index 33dfb5c..62c57a6 100644
--- a/client/src/functions/modes/edit/form_e.rs
+++ b/client/src/functions/modes/edit/form_e.rs
@@ -173,11 +173,7 @@ pub async fn execute_edit_action<S: CanvasState>(
             let num_fields = state.fields().len();
             if num_fields > 0 {
                 let current_field = state.current_field();
-                let new_field = if current_field == 0 {
-                    num_fields - 1
-                } else {
-                    current_field - 1
-                };
+                let new_field = current_field.saturating_sub(1);
                 state.set_current_field(new_field);
                 let current_input = state.get_current_input();
                 let max_pos = current_input.len();
@@ -191,7 +187,7 @@ pub async fn execute_edit_action<S: CanvasState>(
         "move_down" => {
             let num_fields = state.fields().len();
             if num_fields > 0 {
-                let new_field = (state.current_field() + 1) % num_fields;
+                let new_field = (state.current_field() + 1).min(num_fields - 1);
                 state.set_current_field(new_field);
                 let current_input = state.get_current_input();
                 let max_pos = current_input.len();
diff --git a/client/src/functions/modes/read_only/auth_ro.rs b/client/src/functions/modes/read_only/auth_ro.rs
index 9879557..fd9d7a5 100644
--- a/client/src/functions/modes/read_only/auth_ro.rs
+++ b/client/src/functions/modes/read_only/auth_ro.rs
@@ -33,11 +33,7 @@ pub async fn execute_action<S: CanvasState>(
                 return Ok("No fields to navigate.".to_string());
             }
             let current_field = state.current_field();
-            let new_field = if current_field == 0 {
-                num_fields - 1
-            } else {
-                current_field - 1
-            };
+            let new_field = current_field.saturating_sub(1);
             state.set_current_field(new_field);
             let current_input = state.get_current_input();
             let max_cursor_pos = if current_input.is_empty() {
@@ -57,7 +53,7 @@ pub async fn execute_action<S: CanvasState>(
                 return Ok("No fields to navigate.".to_string());
             }
             let current_field = state.current_field();
-            let new_field = (current_field + 1) % num_fields;
+            let new_field = (state.current_field() + 1).min(num_fields - 1);
             state.set_current_field(new_field);
             let current_input = state.get_current_input();
             let max_cursor_pos = if current_input.is_empty() {
diff --git a/client/src/functions/modes/read_only/form_ro.rs b/client/src/functions/modes/read_only/form_ro.rs
index 86d2a48..1a9b217 100644
--- a/client/src/functions/modes/read_only/form_ro.rs
+++ b/client/src/functions/modes/read_only/form_ro.rs
@@ -33,11 +33,7 @@ pub async fn execute_action<S: CanvasState>(
                 return Ok("No fields to navigate.".to_string());
             }
             let current_field = state.current_field();
-            let new_field = if current_field == 0 {
-                num_fields - 1
-            } else {
-                current_field - 1
-            };
+            let new_field = current_field.saturating_sub(1);
             state.set_current_field(new_field);
             let current_input = state.get_current_input();
             let max_cursor_pos = if current_input.is_empty() {
@@ -56,7 +52,7 @@ pub async fn execute_action<S: CanvasState>(
                 return Ok("No fields to navigate.".to_string());
             }
             let current_field = state.current_field();
-            let new_field = (current_field + 1) % num_fields;
+            let new_field = (current_field + 1).min(num_fields - 1);
             state.set_current_field(new_field);
             let current_input = state.get_current_input();
             let max_cursor_pos = if current_input.is_empty() {