*: add instruction for editing config

pd-configuration-file.md

@@ -12,6 +12,10 @@ The PD configuration file supports more options than command-line parameters. Yo
 
 This document only describes parameters that are not included in command-line parameters. Check [here](/command-line-flags-for-pd-configuration.md) for the command line parameters.
 
+> **Tip:**
+>
+> If you need to adjust the value of a configuration item, refer to [Modify the configuration](/maintain-tidb-using-tiup.md#modify-the-configuration).
+
 ### `name`
 
 - The unique name of a PD node

tidb-configuration-file.md

@@ -11,6 +11,10 @@ aliases: ['/docs/dev/tidb-configuration-file/','/docs/dev/reference/configuratio
 
 The TiDB configuration file supports more options than command-line parameters. You can download the default configuration file [`config.toml.example`](https://github.com/pingcap/tidb/blob/master/config/config.toml.example) and rename it to `config.toml`. This document describes only the options that are not involved in [command line options](/command-line-flags-for-tidb-configuration.md).
 
+> **Tip:**
+>
+> If you need to adjust the value of a configuration item, refer to [Modify the configuration](/maintain-tidb-using-tiup.md#modify-the-configuration).
+
 ### `split-table`
 
 - Determines whether to create a separate Region for each table.
@@ -574,7 +578,7 @@ Configuration items related to performance.
 
 + Controls whether to wait for statistics initialization to finish before providing services during TiDB startup.
 + Default value: false
-+ When the value of `force-init-stats` is `true`, TiDB needs to wait until statistics initialization is finished before providing services upon startup. If there are a large number of tables and partitions, setting `force-init-stats` to `true` might prolong the time it takes for TiDB to start providing services. 
++ When the value of `force-init-stats` is `true`, TiDB needs to wait until statistics initialization is finished before providing services upon startup. If there are a large number of tables and partitions, setting `force-init-stats` to `true` might prolong the time it takes for TiDB to start providing services.
 + When the value of `force-init-stats` is `false`, TiDB can still provide services before statistics initialization is finished, but the optimizer uses pseudo statistics to make decisions, which might result in suboptimal execution plans.
 
 ## opentracing

tiflash/tiflash-configuration.md

@@ -34,6 +34,10 @@ You can adjust the PD scheduling parameters using [pd-ctl](/pd-control.md). Note
 
 This section introduces the configuration parameters of TiFlash.
 
+> **Tip:**
+>
+> If you need to adjust the value of a configuration item, refer to [Modify the configuration](/maintain-tidb-using-tiup.md#modify-the-configuration).
+
 ### Configure the `tiflash.toml` file
 
 ```toml

tikv-configuration-file.md

@@ -12,6 +12,10 @@ The TiKV configuration file supports more options than command-line parameters.
 
 This document only describes the parameters that are not included in command-line parameters. For more details, see [command-line parameter](/command-line-flags-for-tikv-configuration.md).
 
+> **Tip:**
+>
+> If you need to adjust the value of a configuration item, refer to [Modify the configuration](/maintain-tidb-using-tiup.md#modify-the-configuration).
+
 ## Global configuration
 
 ### `abort-on-panic`